Entries |
Document | Title | Date |
20080227409 | WIRELESS RECEIVER WITH NOTCH FILTER TO REDUCE EFFECTS OF TRANSMIT SIGNAL LEAKAGE - This disclosure describes techniques for reducing adverse effects of TX signal leakage in a full-duplex, wireless communication device. The techniques make use of a notch filter to reject TX signal leakage in a signal processed in the RX path of the wireless communication device. The notch filter may be constructed as a complex notch filter using passive resistor and capacitor components to produce a notch frequency that attenuates TX signal leakage components in a desired signal. The notch filter may be applied to a down-converted, baseband signal produced by a passive mixer. | 09-18-2008 |
20080233894 | REDUCTION OF SECOND-ORDER DISTORTION CAUSED BY TRANSMIT SIGNAL LEAKAGE - This disclosure describes techniques for reducing adverse effects of TX signal leakage in a full-duplex, wireless communication system. In particular, the disclosure describes techniques for reducing adverse effects of second order distortion of TX signal leakage. To reduce or eliminate second order distortion of transmit signal leakage, a wireless device squares a combined signal that carries both a desired RX signal and a TX leakage signal. For example, the device may include a device that exhibits a strong, second order nonlinearity to, in effect, square the combined signal. The device subtracts the squared signal from the output of the mixer in the receive path, canceling out at least some of the second-order distortion caused by the mixer. In this manner, the device can reduce the adverse effects of second order distortion of TX signal leakage, and thereby enhance or maintain receiver sensitivity. | 09-25-2008 |
20080248759 | Apparatus For Coupling A Wireless Communication Device To A Physical Device - A wireless communication device may be configured to transmit and receive data through a physical device, such as a cable. Relatively higher transmit radio frequency (RF) signals from the wireless communication device may be shifted to a relatively lower frequency, thereby enabling the relatively lower frequency signals to be carried by the physical device. Similarly, relatively lower frequency signals from the physical device may be shifted to relatively higher frequencies, thereby enabling the wireless communication device to receive the signals from the physical device. In one embodiment, the frequency of the RF signals may be between 2.3 and 2.7 GHz and the frequency of the relatively lower frequency shifted signals may be between 900 and 1100 MHz. | 10-09-2008 |
20080311862 | INTEGRATED GALVANIC ISOLATOR USING WIRELESS TRANSMISSION - An embodiment of a wireless galvanic isolator device is formed by a transmitter circuit, a receiver circuit, and a wireless coupling structure, arranged between the transmitter circuit and the receiver circuit. The wireless coupling structure is formed by a pair of antennas each arranged on an own die and integrated together with the respective transmitter and receiver circuit. The two dice may be arranged adjacent to each other in a planar configuration or arranged on top of each other and bonded together. | 12-18-2008 |
20090017775 | Radio front end with resonant transmit/receive switch - A device having a radio front end is provided. The radio front end includes an inductor having a first end and a second end. A capacitor having a first end and a second end is connected to the second end of the inductor. An antenna is connected to the second end of the inductor and the second end of the capacitor. A first switch is connected to the first end of the inductor and the first end of the capacitor, wherein the inductor and capacitor form a resonant circuit when the first switch is closed. A second switch is connected to the resonant circuit, the second switch connecting the resonant circuit to ground through a low impedance when the first switch is closed. A third switch is connected to a transmit power amplifier connecting the transmit power amplifier to ground through a low impedance when the first switch is closed. | 01-15-2009 |
20090017776 | RADIO RECEIVER CIRCUIT, RADIO TRANSCEIVER CIRCUIT AND CALIBRATION METHOD THEREOF - Conventional digital calibration type analog-to-digital converters cannot converge calibration within an preamble period of a packet signal. An analog-to-digital converter is subjected to digital calibration using a beacon signal, a polling signal, or another user signal or a signal applied from a transceiver side to a receiver side. Some or all of circuits are brought into a sleep mode in a period except data reception and the analog-to-digital converter calibration such that a signal monitor unit detects another signal to activate the circuit in the sleep mode for performing the calibration of the analog-to-digital converter for reducing the power consumption. | 01-15-2009 |
20090036065 | TRANSMIT/RECEIVE SWITCH - A radio frequency (RF) transmit/receive switch. The transmit/receive switch comprises an impedance matching circuit and a voltage scaling circuit. The impedance matching circuit matches an incoming RF signal to a low noise amplifier and an outgoing RF signal from a power amplifier. The voltage scaling circuit, coupled to the impedance matching circuit, the power amplifier, and the low noise amplifier, attenuates the outgoing RF signal to a scaled signal within a breakdown voltage of a transistor device in the low noise amplifier during transmission of the outgoing RF signal. | 02-05-2009 |
20090054008 | MULTIMODE COMMUNICATION APPARATUS - In a multimode communication apparatus that uses a plurality of wireless communication modes, interference between communications under different wireless communication modes is suppressed, a good transmission/reception state in each of the wireless communication modes is ensured. A multimode communication apparatus ( | 02-26-2009 |
20090054009 | MULTI-RADIO WIRELESS COMMUNICATION DEVICE AND METHOD FOR COORDINATING COMMUNICATIONS BETWEEN POTENTIALLY INTERFERING RADIOS - Embodiments of a multi-radio wireless communication device having a Worldwide Interoperability for Microwave Access (WiMax) radio module and a Bluetooth (BT) radio module and methods for communicating are generally described herein. Other embodiments may be described and claimed. In some embodiments, a WiMax active signal is asserted by a coexist controller of the WiMax radio module during receipt of a downlink subframe, and the BT radio module aligns a BT slot boundary of either master-to-slave or slave-to-master slot based on timing information conveyed by the WiMax active signal. The WiMax active signal may be de-asserted by the coexist controller during transmission of an uplink subframe by the WiMax radio module. | 02-26-2009 |
20090061791 | Diversity control method - A diversity control method of selecting a plurality of antennas having directivities and disposed in different directions is disclosed. At least two antennas are selected from the plurality of antennas. First diversity control of comparing strengths of reception powers of the selected at least two antennas is performed. One antenna having a stronger reception power than others is selected. If the radio conditions of at least two antennas have deteriorated in the first diversity control, second diversity control of comparing radio conditions of at least two antennas is performed in a predetermined period and at least one of the antennas is changed to another new antenna based on a compared result. | 03-05-2009 |
20090111391 | Wireless communication apparatus and system employing the same apparatuses and method for controlling a plurality of the same apparatuses - At least two or more wireless communication apparatuses ( | 04-30-2009 |
20090117858 | RECEIVE CONFIGURATION ADAPTATION FOR WIRELESS TRANSCEIVERS - An integrated circuit radio transceiver and method therefor is operable to determine an antenna configuration for receive operations. More specifically, the system is operable to determine a receive antenna configuration in a network that includes a number of spatial streams, antenna configuration information, code rate, quadrature modulation type, and transmission protocol modulation scheme, etc. Generally, a selected antenna configuration for transmissions to a remote transceiver is used as an initial antenna configuration for receive operations. | 05-07-2009 |
20090117859 | SYSTEM AND METHOD FOR FREQUENCY OFFSETTING OF INFORMATION COMMUNICATED IN MIMO BASED WIRELESS NETWORKS - A communications system includes a multiple-input/multiple-output architecture, which has a plurality of radio frequency chains. One of the plurality of radio frequency chains is configured to apply a first frequency offset to a base frequency of an output signal to generate a first transmitting frequency; and another of the plurality of radio frequency chains being configured to apply a second frequency offset to the base frequency to generate a second transmitting frequency. | 05-07-2009 |
20090124214 | REMOTE FRONT-END FOR A MULTI-ANTENNA STATION - A multi-antenna station has multiple remote front-ends coupled to multiple antennas. Each remote front-end includes a power amplifier (PA), a low noise amplifier (LNA), and first and second coupling units. On the transmit path, a first RF signal is received via a first port, routed by the first coupling unit to the power amplifier, amplified to obtain the desired output power level, and routed by the second coupling unit to a second port for transmission via the antenna. On the receive path, a second RF signal is received via the second port, routed by the second coupling unit to the LNA, amplified to obtain a higher signal level, and routed by the first coupling unit to the first port for transmission to the transceiver. | 05-14-2009 |
20090130991 | METHOD AND SYSTEM FOR LNA ADJUSTMENT TO COMPENSATE FOR DYNAMIC IMPEDANCE MATCHING - Aspects of a method and system for LNA adjustment to compensate for dynamic impedance matching are provided. In this regard, an antenna matching network may be configured to maximize received signal strength for a determined frequency and an amplifier gain may be adjusted based on the maximized signal strength such that output levels of the amplifier are between specified limits. The antenna matching network may be programmatically controlled via one or more switching elements. The amplifier gain may be programmatically controlled via one or more bias points. The antenna matching network may be configured for a plurality of frequencies in a frequency band, such as an FM broadcast band, and a configuration for each frequency may be stored. Accordingly, when the receiver is tuned to a frequency, a corresponding configuration may be retrieved from memory. | 05-21-2009 |
20090130992 | Antenna co-location in portable devices for simultaneous receive and transmit - Systems and methods are disclosed for the co-location of radio frequency (RF) antennas in portable devices, portable devices and their docking stations and related systems, and devices with restrictive space constraints to allow for simultaneous receive (RX) and transmit (TX) operation without degradation. The systems and methods disclosed overcome RX channel degradation, receiver performance, and other problems seen in prior solutions. More particularly, transmit and receive antennas are oriented to provide for cross-polarization of their electro-magnetic fields, are oriented to allow one or both antenna to fall within null regions of the other antenna, and/or oriented with both cross-polarization and null region considerations in mind. Other variations and implementations are also described. | 05-21-2009 |
20090143026 | System and Method for Adaptive Polarization Diversity Between Closely Spaced Antennas - An electronic device comprises a transceiver and a probe. The transceiver is connected to a first antenna and a second antenna. The first and second antennas are configured to one of transmit and receive radio frequency signals. The first and second antennas are configured to exhibit a polarized diversity. The probe re-establishes the polarized diversity when the polarized diversity has been disrupted. | 06-04-2009 |
20090149137 | INTEGRATED BIDIRECTIONAL JUNCTION ENGINEERED DUAL INSULATOR TRANSCEIVER - A bi-directional transceiver ( | 06-11-2009 |
20090215405 | Transceiver Antennae Arrangement - An apparatus having a transmitter portion and a receiver portion each isolated from each other and comprising a plurality of antennae, each antenna being selectively connectable to both the receiver portion and transmitter portion, said antennae thus being common to both transmitter and receiver. It may be adapted such that one antenna is selectable to be used as a transmitter whilst at the same time an alternative antenna is selectable to be used as a receiving antenna. | 08-27-2009 |
20090215406 | TRANSCEIVER STRUCTURE - The present invention relates to an integrated transceiver structure | 08-27-2009 |
20090247094 | COMMUNICATION APPARATUS AND COMMUNICATION METHOD, AND COMPUTER PROGRAM THEREFOR - A communication apparatus includes a transmitter for transmitting wireless signals, and a receiver for receiving wireless signals. A first communication functional unit uses the transmitter and the receiver to operate as a station in a first network operating on a first communication channel, while a second communication functional unit uses the transmitter and the receiver to operate as a station in a second network operating on a second communication channel different from that of the first network. A controller conducts time division data transfer by utilizing the respective time periods of receiver inactivity on the first and second channels in order to switch operation to the other channel and attempt to receive a signal on the corresponding other network. In so doing, the communication apparatus is able to fulfill dual roles on the networks operating on different channels with the use of a single modem. | 10-01-2009 |
20090275295 | METHOD AND SYSTEM FOR FLIP-CHIP RF FRONT END WITH A SWITCHABLE POWER AMPLIFIER - Methods and systems for a flip-chip RF front end with switchable power amplifier. Aspects of one method may include controlling at least one MEMS switch to allow an on-chip PA and/or an off-chip PA to amplify RF signals for transmission. The MEMS switch may be part of a device package that may be mounted above the flip-chip bonded integrated circuit (IC). Accordingly, various embodiments of the invention may enable controlling of switches to amplify the RF signals via the on-chip RF PA, and the off-chip PA may be bypassed if there is an off-chip RF PA. Various embodiments of the invention may enable controlling the switches to amplify the RF signals via an off-chip RF PA and bypassing an on-chip RF PA. Various embodiments of the invention may also enable controlling the switches to amplify the RF signals via an off-chip RF PA and an on-chip RF PA. | 11-05-2009 |
20090286491 | MEMS-based Radio Frequency Circulator - The invention relates to a circulator with at least three ports (p | 11-19-2009 |
20090291645 | RF TRANSCEIVER HAVING A T/R SWITCH CIRCUIT WITH HIGH POWER-HANDLING CAPABILITY - A RF transceiver includes an antenna, a receiver, a baseband circuit, a transmitter, and a T/R switch circuit. The T/R switch circuit is used for coupling the antenna and the receiver or coupling the antenna and the transmitter. The T/R switch circuit is coupled to the baseband circuit so as to receive biases provided from the baseband circuit. The T/R switch circuit includes four transistors and a power detector. The power detector detects the power of the output signal of the T/R switch circuit, so that the baseband circuit can adjust biases provided to the T/R switch circuit according to the power of the output signal. | 11-26-2009 |
20090305648 | SELF-CALIBRATING MIXER - Mixer circuits ( | 12-10-2009 |
20100022201 | APPARATUS AND METHOD FOR REDUCING SELF-INTERFERENCE IN A RADIO SYSTEM - Full duplex radio wireless systems and methods and especially transceivers for full duplex radio wireless systems with reduction of self-interference are described. MIMO (=multiple input multiple output several antennas for output and input) is used within one device with multiple antennas to remove self-interference in a proactive way. For example, a transceiver is described having self-interference suppression, comprising, within one transceiver device: two or more transmitters comprising one or more signal generators for transmitting transmit signals having transmit center frequencies in a selected first subchannel; and one or more receivers having receiver inputs for simultaneously receiving a desired receive signal in a second subchannel and an undesired accumulated interference signal due to said transmitted signals; and at least one of said transmitters also comprising a precompensation circuit that modifies the transmit signals such that said accumulated interference signal at the receiver(s) inputs is reduced. | 01-28-2010 |
20100022202 | TRANSCEIVER REDUNDANCY IN AN ELECTRONIC TOLL COLLECTION SYSTEM - An electronic toll collection system wherein the reader includes a switching network and a plurality of transceivers operating under the control of a controller. The reader further includes failure detection circuitry for determining whether any of the transceivers have failed based upon the RF outputs of the transceivers. If the controller determines that a transceiver has failed, then it alters the switching pattern such that the switching network excludes the failed transceiver from being connected to the antennas. The reader thereby provides for adaptive RF channel assignment, as the particular transceiver used to excite a particular antenna may be dynamically altered, and the provision of at least two transceivers in the reader ensures transceiver redundancy. | 01-28-2010 |
20100035563 | RF TRANSCEIVER FRONT-END WITH RX/TX ISOLATION - A radio frequency (RF) transceiver front-end includes an antenna, an RF receiver section, an RF transmitter section, a balancing circuit, and a multiple node isolation and coupling circuit. The multiple node isolation and coupling circuit is coupled to the antenna, the RF receiver section, the RF transmitter section, and the balancing circuit. The multiple node isolation and coupling circuit provides an inbound RF signal from the antenna to the RF receiver section and provides an outbound RF signal from the RF transmitter section to the antenna, wherein, by providing an isolating signal to the balancing circuit, the multiple node isolation and coupling circuit substantially isolates the outbound RF signal from the inbound RF signal. | 02-11-2010 |
20100048146 | Transceiver with Compensation for Transmit Signal Leakage and Method Therefor - A transceiver ( | 02-25-2010 |
20100069020 | SEMICONDUCTOR INTEGRATED CIRCUIT, RF MODULE USING THE SAME, AND RADIO COMMUNICATION TERMINAL DEVICE USING THE SAME - One high-frequency switch Qm supplied with transmit and receive signals to ON, and another high-frequency switch Qn supplied with a signal of another system to OFF are controlled. In the other high-frequency switch Qn, to set V-I characteristics of near-I/O gate resistances Rg | 03-18-2010 |
20100075617 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING A SIGNAL IN A COMMUNICATION SYSTEM - A method and an apparatus for transmitting and receiving a signal in a communication system are provided. The method includes transmitting a signal to a receiver through one of the antennas, receiving an antenna switching indicator indicating to switch the transmitting antenna from the receiver, and switching the transmitting antenna according to the antenna switching indicator, and transmitting a signal to the receiver through a switched antenna. | 03-25-2010 |
20100136926 | Off-line channel tuning amplitude slope matched filter architecture - A tuning control system and associated method is provided for continuously and automatically tuning a lobed amplitude slope matching filter (ASMF) to a band center of an interfering signal to provide improved rejection of an interfering signal coupled from a transmission antenna into a local receive antenna in the presence of local multi-path, thereby Providing improved interference cancellation system performance. The tuning control system is provided as an element of an interference cancellation system. | 06-03-2010 |
20100159851 | Wireless Transmitting/Receiving Device - In a wireless transmitting/receiving device of TDD system etc., a transmission signal is detected on the transmitting side in a specified transmission period, a signal reflected from an antenna through a circulator is detected on the receiving side in the transmission period and a reception signal is detected on the receiving side in a specified reception period. In this case, in a part of the transmission period a transmission signal having been detected on the transmitting side is selected while in the remaining part of the transmission period a reflection signal having been detected on the receiving side through a circulator from an antenna is selected, and in the reception period a reception signal having been detected on the receiving side through the circulator from the antenna is selected and outputted. | 06-24-2010 |
20100167665 | Enhanced error correction performance - The exemplary embodiments of this invention relate in part to an apparatus that includes an error correction function and a controller configured to receive radio access scheduling information in response to a scheduling request sent to a multiradio controller. The controller is responsive to the radio access scheduling information containing an indication of a time when during a scheduling interval reception is blocked for a receiver of the apparatus, due at least in part to simultaneously scheduled operation of a transmitter, to send information to the error correction function for marking as erased any symbols received during a time that the reception is indicated to be blocked. The exemplary embodiments of this invention may be realized at least in part in a software defined radio platform that includes the multiradio controller and a plurality of radio access units. | 07-01-2010 |
20100178879 | RF POWER MODULE - A technique is provided for achieving reduction in size of an electronic device with a power amplifier circuit, while enhancing the performance of the electronic device. An RF power module for a mobile communication device includes first and second semiconductor chips, a passive component, and first and second integrated passive components, which are mounted over a wiring board. In the first semiconductor chip, MISFET elements constituting power amplifier circuits for the GSM 900 and for the DCS 1800 are formed, and a control circuit is also formed. In the first integrated passive component, a low pass filter circuit for the GSM 900 is formed, and in the second integrated passive component, a low pass filter circuit for the DCS 1800 is formed. In the second semiconductor chip, antenna switch circuits for the GSM 900 and DCS 1800 are formed. Over the upper surface of the wiring board, the second semiconductor chip is disposed next to the first semiconductor chip between the integrated passive components. | 07-15-2010 |
20100197244 | Direct coupled radio frequency (RF) transceiver front end - A method and apparatus is disclosed to couple a transmission amplifier and a reception amplifier to a shared medium. An output of the transmission amplifier is directly coupled to an input of the reception amplifier to form a common connection. The transmission amplifier and the reception amplifier may receive a first amplifier bias via the common connection. In response to the first amplifier bias, the transmission amplifier provides a first communication signal to the shared medium and the reception amplifier does not provide a second communication signal from the shared medium. Alternatively, the transmission amplifier and the reception may receive a second amplifier bias via the common connection. In response to the second amplifier bias, the reception amplifier provides the second communication signal from the shared medium and the transmission amplifier does not provide the first communication signal to the shared medium. | 08-05-2010 |
20100203843 | RADIO FREQUENCY TRANSCEIVER FRONT END CIRCUIT WITH DIRECT CURRENT BIAS SWITCH - A front end circuit for coupling an antenna to a radio frequency (RF) transceiver for time domain duplex systems is disclosed. The front end circuit includes an antenna port, a power amplifier, a low noise amplifier, and a matching network. The output of the power amplifier and the input of the low noise amplifier are coupled to the matching network and connected in common to the antenna. The power amplifier and the low noise amplifier are activated and deactivated in sequence corresponding to the transmit and receive modes of the transceiver, and the matching network minimizes the effect that one has on the other at the designated operating frequency. | 08-12-2010 |
20100210223 | MULTI MODE RADIO FREQUENCY TRANSCEIVER FRONT END CIRCUIT WITH INTER-STAGE MATCHING CIRCUIT - A front end circuit for coupling an antenna to a first radio frequency (RF) transceiver and a second RF transceiver is contemplated. The RF transceivers have a signal input, a signal output, a receive enable line and a transmit enable line. In addition to an antenna port, the front end circuit has a first power amplifier and a first low noise amplifier both coupled to first RF transceiver, and a second power amplifier and a second low noise amplifier both coupled to the second RF transceiver. The front end circuit includes a matching network that couples the power amplifiers and the low noise amplifiers, the various outputs and inputs thereof being common. | 08-19-2010 |
20100216412 | CONFIGURABLE TRANSCEIVER AND METHODS FOR USE THEREWITH - A configurable radio frequency (RF) transceiver includes a configuration controller that generates at least one mode control signal that indicates an isolation mode, a frequency mode and an antenna mode. An antenna section includes a plurality of antennas and that selects an antenna configuration based on the at least one mode control signal. An isolation section includes a plurality of isolation circuits and that selects an isolation circuit based on the at least one mode control signal. An RF section selects an RF configuration based on the at least one mode control signal. A baseband section selects a baseband configuration based on the at least one mode control signal. | 08-26-2010 |
20100216413 | LEAKAGE SUPPRESSING CIRCUIT - A leakage suppressing circuit for a communication device is provided. The leakage suppressing circuit comprises a signal transforming unit having an input for receiving an input signal, a first output and a second output, the signal transforming unit being configured such that the phase of an output signal at the first output is at least substantially the same as or at least substantially opposite to the phase of an output signal at the second output, and the power of the output signal at the first output is at least substantially equal to the power of the output signal at the second output, a first signal directing unit, a second signal directing unit, and a combining unit. | 08-26-2010 |
20100227570 | ISOLATION TECHNIQUES FOR MULTIPLE CO-LOCATED RADIO MODULES - Isolation techniques for multiple co-located radio modules are disclosed. For example, an apparatus may include an antenna, a first transceiver to communicate wirelessly across a first link, a second transceiver to communicate wirelessly across a second link, a shared antenna structure operative to allow the first transceiver and the second transceiver to share the antenna for simultaneous operations, and an active signal canceller operative to generate a cancellation signal to cancel an interference signal for a radio-frequency coupling channel between the first and second transceivers. Other embodiments are disclosed and claimed. | 09-09-2010 |
20100227571 | Antenna switch and radio communication device - An antenna switch selectively connects one of a transmission signal terminal and a reception signal terminal to a common terminal, and includes a plurality of external terminals including the common terminal, the transmission signal terminal, and the reception signal terminal, a semiconductor chip having a plurality of terminals formed therein, and a plurality of bonding wires that connect the external terminals and the plurality of terminals formed in the semiconductor chip. Two bonding wires that are adjacent to each other among the plurality of bonding wires are used as directional couplers. | 09-09-2010 |
20100248651 | Antenna Matching for MIMO Transceivers - A multiple antenna system is described herein that mitigates the negative effects of mutually coupled antennas on the connected transmitters and/or receivers. The antenna system comprises a directional coupler and two or more antennas. The directional coupler comprises multiple communication ports that each connect to corresponding antenna ports. The connection ports each connect to a different transmitter, receiver, or transceiver. A transmission line connects each antenna port to an antenna. The lengths of the transmission lines and the coupling factor of the directional coupler are selected to decouple the communication ports of the directional coupler. More particularly, the coupling factor and the transmission line lengths are selected so that antenna crosstalk signals caused by mutual coupling between the antennas and the coupled signals produced by the directional coupler have the same magnitude but opposite phase at the communication ports of the directional coupler. | 09-30-2010 |
20100248652 | RADIO FREQUENCY INTERFACE SWITCHING DEVICE - An exemplary radio frequency interface switching device includes a plurality of signal interfaces, a plurality of switches electrically connected to the signal interfaces, and a switch unit electrically connected to the switches. The signal interfaces are electrically connected with each other by operating different combinations of the switches and the switch unit to receive/send corresponding signals. | 09-30-2010 |
20110003563 | Radio Frequency Front End Circuit with Antenna Diversity for Multipath Mitigation - A front end circuit for selectively coupling a first antenna and a second antenna to a transmit chain and a receive chain of a radio frequency (RF) transceiver is disclosed. There is a first power amplifier having an input connectible to the transmit chain of the RF transceiver, a first low noise amplifier having an output connectible to the receive chain of the RF transceiver, and a second low noise amplifier with an input connectible to the second antenna, as well as an output connectible to the receive chain of the RF transceiver. A first matching and switch network is connected to the first antenna, the output of the first power amplifier, and the input of the first low noise amplifier. Transmit signals from the first power amplifier and receive signals from the first antenna are selectively passed to the first antenna and the first low noise amplifier. | 01-06-2011 |
20110028104 | RECEIVER FOR SIGNAL COMMUNICATION SYSTEM WITH DISTURBANCE REJECTION CIRCUIT - A receiver of a signal communication apparatus; the apparatus having a transmitter for transmitting the signals, the receiver for receiving the signals and a galvanically isolated wireless interface interposed between the transmitter and the receiver and having a transmitting antenna and a receiving antenna. The receiver including a disturbance rejection circuit coupled to the receiving antenna and capable of compensating for the parasite currents flowing between the transmitting antenna and the receiving antenna at the potential variations between the input and output of the galvanic isolation interface. | 02-03-2011 |
20110039504 | MATCHING CIRCUIT FOR ADAPTIVE IMPEDANCE MATCHING IN RADIO - An impedance matching circuit for a radio receives antenna signals and has its matching elements, such as capacitors, progressively switched into the circuit, with the matching element configuration resulting in the highest RSSI being subsequently used until a succeeding test or antenna impedance change. The effect of the matching circuit is accounted for in the transmitter calibration routine so that the matching circuit works for both half duplex and full duplex. | 02-17-2011 |
20110045786 | APPARATUS AND METHOD FOR SWITCHING FROM RECEPTION TO TRANSMISSION - The invention is related to an apparatus comprising: at least one definition unit configured to define signal characterizing parameters of a transmission; and at least one routing unit configured to route the transmission to at least one transmission path based on the signal characterizing parameters, the at least one transmission path arranged to convey the transmission to at least one antenna. | 02-24-2011 |
20110070843 | WIRELESS TERMINAL - A wireless terminal includes an antenna which comprises an antenna element and at least one frequency switching circuit to control an operating frequency of the antenna element in accordance with a frequency control signal, a plurality of RF circuits to perform an RF signal processing, an antenna switch to connect the antenna to one of the plurality of RF circuits in accordance with a connection control signal, and a generation unit configured to generate the frequency control signal and the connection control signal in accordance with switching between a plurality of wireless communication systems or switching between transmission and reception. | 03-24-2011 |
20110070844 | ELECTRONIC APPARATUS AND DATA COMMUNICATION SYSTEM - An electronic apparatus includes a communication module configured to execute a wireless communication in a transmission mode for sending data to a counterpart electronic apparatus or a reception mode for receiving data from a counterpart electronic apparatus, an orientation detector configured to detect orientation of the electronic apparatus, and a communication controller configured to switch between the transmission mode and the reception mode according to the orientation of the electronic apparatus detected by the orientation detector. | 03-24-2011 |
20110076966 | METHOD FOR DRIVING AN ANTENNA OF A MOBILE DEVICE - A method for driving an antenna of a mobile device, and a mobile device comprising an antenna, a plurality of antenna matching circuits, a selecting unit and a processing unit are described. | 03-31-2011 |
20110076967 | IMPEDANCE MATCHED LANE REVERSAL SWITCHING SYSTEM - An impedance matched lane reversal switching system including first and second transceiver pairs, each of the pairs including a transmitter connected to a receiver, the output of the transmitter connected to the input of the receiver and to a node, the node of each pair interconnected with a transmission line and a switching circuit for selectively enabling one of the transmitters of one of the transceiver pairs and disabling the other and selectively utilizing one of the receivers of the other of the transceiver pairs and not the other to selectively reverse an egress side and an ingress side of the lane. | 03-31-2011 |
20110098009 | Transceiver System and Method of Using Same - A transceiver is provided for wireless communication. The transceiver can include a bias source, a transformer including a primary side and a secondary side, and a switching device. During a receive mode, the primary side of the transformer is configured to receive a first signal from a first port. During a transmission mode, the primary side is configured to transmit a second signal from a second port. The switching device is configured to couple the first port to the bias source during transmission of the second signal and to couple the second port to the bias source during receipt of the first signal. The bias source can be, for example, ground. | 04-28-2011 |
20110111707 | RF INTEGRATED CIRCUIT WITH ON-CHIP TRANSMIT/RECEIVE SWITCH AND METHODS FOR USE THEREWITH - First and second control signals select either a receive mode or a transmit mode for two RF transceivers, each control signal having a first value when the transmit mode is selected and a second value when the receive mode is selected. First and second transmit/receive switches, each include an on-chip microelectromechanical switch, and each respond to their corresponding control signal to implement either the transmit mode or the receiver mode. | 05-12-2011 |
20110136444 | Transmit and receive antenna - A transmit/receive antenna for transmission and reception of electromagnetic signals. The transmit/receive antenna comprises a TX section and an RX section, where the TX section comprises a magnetically coupled TX element and a TX input terminal and the RX section comprises at least one magnetically coupled RX element and has an RX output terminal. Axes of the TX loop element and the at least one magnetically coupled RX solenoid element are parallel. Moreover, the at least one magnetically coupled RX element is positioned to provide high isolation at the RX terminal of the antenna from TX electrical signals fed to the TX input. Specifically, the at least one magnetically coupled RX element is positioned at a so that the net magnetic flux generated by the TX loop element and threading the RX solenoid element is zero. | 06-09-2011 |
20110136445 | RFID READER AND METHOD FOR SUPPRESSING TRANSMISSION LEAKAGE SIGNAL THEREOF - Provided are an RFID reader and a method for suppressing transmission leakage signals thereof. The RFID reader includes a first loop, a second loop, and a digital signal processor. The first loop suppresses a first transmission leakage signal of an RX signal in response to a first leakage control signal. The second loop suppresses a second transmission leakage signal of the RX signal, received through the first loop, in response to a second leakage control signal. The digital signal processor generates the first leakage control signal and the second leakage control signal. The digital signal processor generates the first leakage control signal until the level of the first transmission leakage signal becomes equal to or lower than the level of a first reference transmission leakage signal. | 06-09-2011 |
20110136446 | COMBINED INTELLIGENT RECEIVE DIVERSITY (IRD) AND MOBILE TRANSMIT DIVERSITY (MTD) WITH INDEPENDENT ANTENNA SWITCHING FOR UPLINK AND DOWNLINK - Methods and apparatus are provided for allowing a transmitter (Tx) to perform antenna selection independently of a receiver (Rx) in a transceiver supporting both transmit diversity and receive diversity. Certain aspects may utilize a cross switch, which may be used in a parallel or cross configuration, to provide for the independent antenna selection, such that the Rx may maintain the ability to operate on the same antenna as the Tx, on another antenna, or on both antennas for enhanced receive diversity. Furthermore, certain aspects may employ additional switching in the baseband domain in an effort to avoid, or at least reduce, switching glitches in the Rx caused by changing the cross switch configuration. In this manner, the Rx need not re-converge upon antenna switching. | 06-09-2011 |
20110143690 | METHOD AND SYSTEM FOR INTEGRATING TRANSMIT SWITCH FUNCTIONALITY IN A WLAN RADIO TRANSCEIVER - A radio transceiver is disclosed. The transceiver comprises an integrated circuit. The integrated circuit comprises a transmit path; a first switch coupled in series with the output of the transmit path; a receive path; and a second switch coupled as a shunt with the input of the receive path. The transceiver further comprises a plurality of external matching networks coupled to the transmit and receive paths of the integrated circuit to ensure minimal loading from one path to the other. The transceiver also comprises a shared balun for converting differential signals from the plurality of external matching networks to single ended signals; and an antenna to interface with the single ended signals. A method and system in accordance with an embodiment enables tying together the transmit path and the receive paths of a radio transceiver without the need for an external T/R switch. A method and system in accordance with an embodiment minimizes the loading effects between the transmit path and the receive path such that output power and NF noise figure are not degraded after tying the transmit path and the receive path together. | 06-16-2011 |
20110159822 | SEMICONDUCTOR SWITCH AND WIRELESS DEVICE - According to one embodiment, a semiconductor switch includes a voltage generator, a voltage controller, a driver, and a switch unit. The voltage generator generates a negative first potential. The voltage controller controls the first potential according to a terminal switch signal input from an outside. The driver is input the terminal switch signal, and outputs at least one selected from the first potential and the second potential based on the terminal switch signal. The second potential is a power supply voltage or is higher than the power supply voltage. The switch unit is provided on an SOT substrate, switches a connection between an anntena terminal and any one of high frequency terminals based on the output of the driver. | 06-30-2011 |
20110159823 | RF Front-end Circuit and Wireless Communication Device Using the Same - The present invention discloses an RF front-end circuit for a wireless communication device, which includes an RF terminal coupled to an antenna of the wireless communication device, for receiving or transmitting wireless signals; and a switch for connecting a plurality of processing modules to the RF terminal according to operations of the wireless communication device. | 06-30-2011 |
20110165848 | TRANSMIT-RECEIVE RADIO FREQUENCY FRONT END INTEGRATED CIRCUITS FOR LAPTOP COMPUTER APPLICATIONS - A radio frequency communications system with a first operating frequency band and a second operating frequency band is disclosed. There is a first antenna. A transceiver has a first transmission port, a second transmission port, a first reception port, and a second reception port. In a first front end circuit, a first port is coupled to the antenna, and a second port is coupled to the transceiver. The first front end circuit has a first low noise amplifier, a second low noise amplifier, a first power amplifier, and a second power amplifier. A switching circuit connects the first transmission port, the first reception port, the second transmission port, and the second reception port to the second port of the first front end circuit. The antenna is distant from the transceiver, while the first front end circuit is proximal to the antenna. The first switching circuit is proximal to the transceiver. | 07-07-2011 |
20110195672 | INTEGRATED CIRCUITS, COMMUNICATION UNITS AND METHODS OF CANCELLATION OF INTERMODULATION DISTORTION - A wireless communication unit includes a transmitter for processing a baseband transmit signal to produce a first radio frequency signal. A receiver is arranged to convert a second radio frequency signal to a baseband receive signal, where the receiver has a summation module arranged to add a cancellation signal to the baseband receive signal. A selectivity element is arranged to couple the transmitter and the receiver to an antenna, where a reduced portion of the first radio frequency signal is introduced into the second radio frequency signal thereby creating a second order inter-modulation distortion component in the baseband receive signal. An adaptive estimator module has a filter for filtering the baseband receive signal to remove dc offsets associated with the second order inter-modulation distortion component and generate the cancellation signal based on the baseband transmit signal and the filtered baseband receive signal for inputting to the summation module. | 08-11-2011 |
20110195673 | INTEGRATED CIRCUITS, COMMUNICATION UNITS AND METHODS OF CANCELLATION OF INTERMODULATION DISTORTION - A wireless communication unit includes a transmitter, a receiver, a selectivity element and a baseband processing module. The receiver has at least one summation module arranged to add a cancellation signal to the quadrature baseband receive signal. a baseband processing module arranged to: receive the quadrature baseband transmit signal and quadrature baseband receive signal; apply independent gain and phase adjustments to quadrature portions of the quadrature baseband transmit signal, based on at least one signal component of the quadrature baseband receive signal, to form independent cancellation signals; and apply the independent cancellation signals to the at least one summation module. | 08-11-2011 |
20110201283 | METHOD AND SYSTEM OF BEAMFORMING A BROADBAND SIGNAL THROUGH A MULTIPORT NETWORK - Aspects of a method and system for beamforming a broadband signal through a multiport network are provided. In this regard, a plurality of signals received via a plurality of antennas may be detected and a plurality of transmit signals may be generated, wherein a phase of at least one of the plurality of transmit signals is responsive to at least one of the detected phases of the received signals. Each of the generated plurality of transmit signals may be separately amplified to generate a plurality of amplified signals. A plurality of the amplified signals may be input to a plurality of first ports of a multi-port network, wherein at least one second port of the multi-port network may be responsive to signals input to at least two of the plurality of first ports. | 08-18-2011 |
20110201284 | DC OFFSET CALIBRATION IN A DIRECT CONVERSION RECEIVER - A direct conversion receiver ( | 08-18-2011 |
20110237207 | ADAPTIVE ANTENNA NEUTRALIZATION NETWORK - An adaptive antenna neutralization network (AANN) for neutralizing coupling between a first antenna and a second antenna of a mobile terminal is disclosed. The AANN includes an array of reactive branches. Each of the reactive branches includes a reactive element and an electrically controlled switch with a control input for selectively coupling the reactive element between the first antenna and the second antenna. Also included is a switch driver having an output coupled to the control input of each electrically controlled switch, and a controller having an output for sending control signals to the switch driver to turn on or off individual ones of the electrically controlled switches in response to conditions that indicate a coupling state between the first antenna and the second antenna. | 09-29-2011 |
20110256837 | COHERENT TRANSCEIVER AND RELATED METHOD OF OPERATION - A transceiver is provided, comprising: a programmable waveform generator configured to generate a base signal, the programmable waveform generator including a controllable waveform generator configured to generate an initial bandwidth signal having an initial frequency bandwidth; a multiple tone generator configured to generate a plurality of tone signals, each tone signal having a different frequency; one or more bandwidth multiplying circuits; and a control circuit a controller configured to control the operation of the controllable waveform generator, the tone generator and the one or more bandwidth multiplying circuits; a transmit port configured to output the base signal; a receive port configured to accept a received signal; a 90-degree splitter configured to receive the base signal and to generate a first split signal at a 0-degree output and a second split signal at a 90-degree output, the first and second split signals being separated by 90 degrees in phase; a first-mixer configured to mix the received signal and the first split signal to generate a quadrature-phase signal; and a second-mixer configured to mix the received signal and the second split signal to generate an in-phase signal. | 10-20-2011 |
20110269411 | Connection-Responsive Push-to-Talk - Apparatus and method to monitor the coupling of one or two audio devices and to augment the function of a PTT switch to causes the PTT function of one audio device to be engaged regardless of which of the two operated positions into which the switch is moved in response to there being only the one audio device coupled to the apparatus and in response to the one audio device being a radio, to cause the PTT function of either one of two audio devices to be selected to be engaged depending on which operated position to which the PTT switch is moved in response to there being only one audio device in the form of an intercom system (ICS) coupled to the apparatus with the other audio device in the form of a radio being coupled through the ICS, and to allow the PTT to be used to select the PTT function of either one of two audio devices to be engaged in response to there being two audio devices in the form of radios coupled to the apparatus. | 11-03-2011 |
20110269412 | Selective Push-to-Talk - A push-to-talk (PTT) switch with biasing to a first center position in which in which the PTT function of neither one of up to two audio devices is engaged, also having a first operated position to which the switch may be moved by hand operation to cause the PTT function of the first one of the two audio devices to be engaged, and further having a second operated position to which the switch may be moved by hand operation to cause the PTT function of the second one of the two audio devices to be engaged. | 11-03-2011 |
20110294443 | HIGH ISOLATION SWITCH WITH NOTCH FILTER - A switching method and apparatus that provides high isolation between circuit arms of a mobile communication device by attenuating noise over a defined frequency range using a switched shunt LC notch filter. | 12-01-2011 |
20110300813 | MULTIPLE-PHASE FREQUENCY TRANSLATED FILTER - A frequency translation filter includes a baseband filter circuit, a clock generator, and a switching circuit. The baseband filter circuit is operable to provide a baseband filter response. The clock generator is operable to generate multiple-phase clock signals at a desired frequency. The switching circuit is operable to frequency translate the baseband filter response of the baseband filter circuit to a high frequency filter response in accordance with the multiple-phase clock signals. | 12-08-2011 |
20110319038 | METHOD AND APPARATUS FOR CONTROLLING MULTI BAND ANTENNA IN MOBILE COMMUNICATION TERMINAL - An apparatus and method for controlling a multi-band antenna in a mobile communication terminal are provided. An apparatus for controlling a multi-band antenna in a mobile communication terminal includes a modem, an antenna unit, a Radio Frequency (RF) processing unit, and a switch module. The modem outputs at least one control signal corresponding to a target frequency band. The antenna unit changes a resonance frequency of the antenna according to the at least one control signal. The RF processing unit includes a plurality of transmission/reception (TX/RX) paths and processes TX/RX signals. The switch module connects the antenna to one of the TX/RX paths according to the at least one control signal. | 12-29-2011 |
20120009886 | ARCHITECTURE FOR COEXISTENCE OF MULTIPLE BAND RADIOS - A front end module for use with a first and a second radio frequency transceiver, constituted of: a control circuitry; a first antenna connection port; a second antenna connection port; a filter arranged to substantially attenuate the carrier frequency bandwidth of the second radio frequency transceiver; and a plurality of electronically controlled switches, wherein the control circuitry is arranged to: in the event that the first and second radio frequency transceivers are simultaneously operative, set the plurality of electronically controlled switches to connect the first radio frequency transceiver to one of the first and second antenna connection ports via the filter; and in the event that the first and second radio frequency transceivers are not simultaneously operative, set the plurality of electronically controlled switches to bypass the filter and connect the first radio frequency transceiver to one of the first and second antenna connection ports. | 01-12-2012 |
20120009887 | WIRELESS CIRCUITRY WITH REDUCED HARMONIC INTERFERENCE - An electronic device has wireless communications circuitry that includes transmitters and receivers. Antenna structures may be coupled to the transmitters and receivers to support radio-frequency signal transmission and radio-frequency signal reception operations. Switching circuitry such as first and second radio-frequency switches may be used to support multiple communications bands of interest. A low band set of transmitters may be associated with the first switch and a high band set of transmitters may be associated with the second switch. The switches can be configured in real time to switch a desired communications band into use. As transmitted signals at frequency f pass through the switches, harmonics at | 01-12-2012 |
20120015611 | APPARATUS FOR MINIMIZING AMPLIFER OSCILLATION IN ANTENNA SYSTEM - Embodiments of an apparatus for minimizing oscillation of an amplifier in an antenna system are provided. These embodiments can comprise passive circuitry in the form of a coupling simulator that includes passive elements selected and combined to generate an output with properties that can cancel or substantially reduce a coupled input as between two antennas in the antenna system. In one example, the coupling simulator may include a phase-shifting device and an attenuating device, each of which have properties with values selected based on parameters that result from the relationship between the antennas of the antenna system. | 01-19-2012 |
20120058736 | Transceiver Front-End - A transceiver front-end provides an interface between a transmission medium and transmitter, and between a transmission medium and receiver. The transceiver front-end includes a hybrid circuit, a high-pass filter, and a gain stage, that permits the reduction or the complete elimination of buffer amplifiers. Buffer amplifiers can be eliminated because the hybrid circuit and/or the high-pass filter are adapted so that they can be directly connected to each other, without a loss in circuit performance. Furthermore, the high-pass filter and/or the gain stage are also adapted so they can be directly connected. As such, the transceiver front-end can be constructed using all passive components, reducing or eliminating excess heat generation. | 03-08-2012 |
20120064841 | CONFIGURING ANTENNA ARRAYS OF MOBILE WIRELESS DEVICES USING MOTION SENSORS - A device and method for the real-time motion detection and reconfiguration of an antenna array of a mobile wireless device is described. The mobile wireless device includes an antenna array for receiving and transmitting wireless signals, a motion sensor coupled to the antenna array, and a first circuitry coupled to the antenna array and the motion sensor. A change in orientation of the antenna array is detected by the motion sensor in real time and recognized by the first circuitry. The antenna array is reconfigured by the first circuitry in response to the detected change in orientation in an expeditious manner. | 03-15-2012 |
20120064842 | Transmitting/Receiving Device and Method for Transmitting Data in a Radio Network - In one embodiment, a method includes receiving an instruction for a transceiver of a device to transmit a first data frame; in response to the instruction, generating a first control signal for a switch to couple the transceiver to a first antenna for transmission of the first data frame by the transceiver via the first antenna; determining whether the transceiver has received within a pre-determined time interval after the transmission of the first data frame a second data frame containing an acknowledgement message confirming successful receipt of the first data frame by another device; and, if the transceiver has not received within the pre-determined time interval after the transmission of the first data frame the second data frame, then generating a second control signal for the switch to couple the transceiver to the second antenna for re-transmission of the first data frame by the transceiver via a second antenna. | 03-15-2012 |
20120094617 | MODULE FOR MOBILE COMMUNICATION TERMINAL, AND MOBILE COMMUNICATION TERMINAL - A tunable filter in a tunable DPX module has frequency characteristics, and thus needs to be controlled with high accuracy so as to simultaneously cancel a transmission signal and noise in a reception band on a transmission side. For this reason, a canceller includes a filter having the same frequency characteristic as that of a tunable filter, and a structure having functions of compensating for an amplitude, a phase, and a delay. And, two lines of the cancellers are used to individually cancel a leak component of a transmission signal and a leak component of thermal noise in a reception band. In order to save the power consumption of the amplifier, a coupler is loosely coupled, and a combiner is tightly coupled. Further, in order to suppress the influence on a reception system due to the tough coupling, the combiner uses the amplifier for in-phase inputs. | 04-19-2012 |
20120108184 | MOBILE TERMINAL AND COMMUNICATION METHOD - A mobile terminal may use an antenna unit of a second device to transmit and/or receive data. The mobile terminal may allow a second device to use its antenna unit to transmit and/or receive data. The mobile terminal may suspend control of its antenna unit if a second device is transmitting or receiving from the antenna unit. A communication method allows a mobile terminal to use the antenna unit of a second device to transmit and/or receive and the second terminal to use the antenna unit of the mobile terminal to transmit and/or receive. | 05-03-2012 |
20120129471 | WIRELESS COMMUNICATION APPARATUS - According to one embodiment, a wireless communication apparatus includes a wireless unit and a control unit. The wireless unit is configured to set, for each period, a transmit state including a first period for transmitting a connection request to establish connection or a receive state including a second period for receiving a connection request and to transmit or receive a signal, both lengths of the first period and the second period being equal. The control unit is configured to control the wireless unit to operate in one of a transmit mode, a receive mode and a transceive mode. The control unit causes the wireless unit to operate in the receive mode or the transceive mode before a trigger signal is externally input, and to operate in the transmit mode if the trigger signal is input. | 05-24-2012 |
20120129472 | MOBILE WIRELESS COMMUNICATIONS DEVICE WITH HUMAN INTERFACE DIVERSITY ANTENNA AND RELATED METHODS - A mobile wireless communications device may include a portable handheld housing, and a wireless transceiver carried by the housing. A pair of an antennas are positioned in side-by-side relation preferably in the upper portion of the portable handheld housing. A human interface diversity controller is connected to the wireless transceiver to preferentially operate with the plurality of antennas based upon a relative position of the portable handheld housing with respect to a hand of a human user. The device can select or weight the antennas based upon the position of the device when being held by a user. | 05-24-2012 |
20120142285 | ANTENNA SWITCHING SYSTEM AND ANTENNA SWITCHING METHOD - According to one embodiment, an antenna switching system includes a (a≧3) antennas and a selector. The selector selects b | 06-07-2012 |
20120149313 | APPARATUS AND METHOD FOR IMPROVING RSE PERFORMANCE OF MULTI-STANDBY TERMINAL - An apparatus and method for improving Radiated Spurious Emission (RSE) performance of a multi-standby terminal supporting 3 | 06-14-2012 |
20120157011 | ELECTRONIC SWITCH AND COMMUNICATION DEVICE INCLUDING SUCH A SWITCH - Switch including a terminal of a first type and at least two terminals of a second type, and a number of circuits capable of ensuring exclusive connection of one of the terminals of the second type to the terminal of the first type as a function of a set of control orders wherein the terminal of the first type is connected to a common point by a first circuit; each terminal of the second type is connected to the common point by a second circuit, with each second circuit including a portion that is magnetically coupled to the first circuit, a static switch mounted in parallel with the portion and capable of being controlled in the “off” state in order to connect the terminal of the first type to the terminal of the second type associated with the second circuit in question. | 06-21-2012 |
20120171968 | DUAL MODE TRANSCEIVER - A circuit is disclosed with an external coupling port for coupling to an external antenna, for example. The circuit has an FDD receive path including a narrowband passband filter. The circuit has a TDD receive path bypassing the narrowband passband filter but relying on a same amplifier. The circuit also has an FDD transmit path including a narrowband passband filter. The circuit has a TDD transmit path bypassing the narrowband passband filter of the FDD transmit path but relying on a same transmit amplifier. A switching configuration allows the circuit to operate in TDD mode, alternating between the TDD receive path and the TDD transmit path and in the FDD mode wherein the FDD transmit and receive paths are simultaneously coupled to the external coupling port. | 07-05-2012 |
20120171969 | Apparatus For Coupling A Wireless Communication Device To A Physical Device - A wireless communication device may be configured to transmit and receive data through a physical device, such as a cable. Relatively higher transmit radio frequency (RF) signals from the wireless communication device may be shifted to a relatively lower frequency, thereby enabling the relatively lower frequency signals to be carried by the physical device. Similarly, relatively lower frequency signals from the physical device may be shifted to relatively higher frequencies, thereby enabling the wireless communication device to receive the signals from the physical device. In one embodiment, the frequency of the RF signals may be between 2.3 and 2.7 GHz and the frequency of the relatively lower frequency shifted signals may be between 900 and 1100 MHz. | 07-05-2012 |
20120178385 | APPARATUS AND METHOD FOR PROCESSING VOICE COMMUNICATION IN MOBILE TERMINAL - A device and method process voice communication service. A mobile terminal device of the present disclosure includes a microphone arranged at one end of a body of the device; a speaker arranged close to the microphone; a transceiver arranged at the other end of the body; a codec including a coder connected to the microphone, a decoder connected to the speaker, and a switch of which one node is connected to one of the coder and the decoder selectively and the other node is connected to the transceiver; and a communication controller which controls the switch to establish a path between the coder and the transceiver and enables the speaker in speakerphone mode. | 07-12-2012 |
20120190312 | RADIO ANTENNA SWITCH - A radio antenna switch module for a high frequency radio transceiver enables the radio transceiver to have a small number of receivers and transmitters and a larger number of antennas, whereby each antenna has a different diversity characteristic. The diversity between antennas provide for greater communication reliability, while the small number of receivers and transmitters allows the transceiver to operate at relatively low power compared to conventional radio transceivers. The switch module also allows for two loopback modes between the transmitter and the receiver for at-speed, low-cost self-test in production. | 07-26-2012 |
20120202438 | SYSTEM AND METHOD OF TRANSISTOR SWITCH BIASING IN A HIGH POWER SEMICONDUCTOR SWITCH - A system and method are provided for biasing transistor switches in a semiconductor based high power switch. Off-state Vgsd biasing for the off transistor switches is based upon acceptable levels of spurious harmonic emissions and linearity. | 08-09-2012 |
20120214428 | Predistortion Device, Method for Predistortion, and Transmitter/Receiver System - The embodiments of the present invention provide a predistortion device, method for predistortion and transmitter/receiver system. The predistortion device comprises a predistortion unit, and the predistortion device further comprises: a signal acquiring unit to process the output signals of a transmitting circuit to obtain distorted signals; a signal coupling unit to couple the distorted signals acquired by the signal acquiring unit to the receiving signals inputted to a receiving circuit; and a signal processing unit to decouple the output signals of the receiving circuit to acquire the distorted signals and the receiving signals. With the embodiments of the present invention, an analog receiving circuit may be reused in a half duplexing system and a full duplexing system, and the requirement on the analog receiving circuit is lowered, thereby reducing the cost. | 08-23-2012 |
20120231751 | RADIO COMMUNICATION TERMINAL - A mobile communication terminal ( | 09-13-2012 |
20120244821 | RADIO COMMUNICATION APPARATUS - A communication apparatus includes a radio portion ( | 09-27-2012 |
20120252375 | Method and System for Dynamic Selection of a Coexistence Method and Transmit Power Level Based on Calibration Data - Aspects of the invention may comprise a control system in communication with a radio frequency (RF) front-end subsystem. The RF front-end subsystem comprises a plurality of antennas coupled to a plurality of wireless transmitters or receivers. Each of the wireless transmitters or receivers is operable to communicate via one or more of a plurality of wireless interfaces in the communication device. The control system is configured to detect, based on interference data provided by the RF front-end system, potential interference by an interfering one of said plurality of wireless transmitters or receivers with operations of an interfered-with one of said plurality of wireless transmitters or receivers. The control system is further configured to mitigate said detected interference operation by providing calibration data to said interfered-with one or more of said plurality of wireless transmitters or receivers. | 10-04-2012 |
20120289172 | ARRAY ANTENNA SYSTEM - A method for an antenna system including a transmitting phase array antenna including a transmitting antenna subarray including a number of antenna elements transmitting on a first frequency and a receiving phase array antenna including a receiving antenna subarray including a number of antenna elements. The transmitting antenna subarray antenna is positioned at a distance relative the receiving antenna subarray antenna and the coupling between two antenna subarrays are decided and used for controlling the transmitting subarray antenna to transmit in such a way that there will be nulling of the energy in the receiving antenna subarray antenna with respect to the transmitting antenna subarray. | 11-15-2012 |
20120295556 | SIGNAL TRANSCEIVER - A signal transceiver includes a first power amplifier coupled to a chip output port of a chip; an impedance transforming circuit; a switching circuit arranged to selectively couple the chip output port to a first port of the impedance transforming circuit; and a receiving amplifier coupled to a second port of the impedance transforming circuit. | 11-22-2012 |
20120295557 | Wireless Communication Apparatus Having Modulated Tx Clock Spur Control - A wireless telecommunication apparatus comprising—a baseband for the purpose of generating and receiving base-band signals; —a RF transceiver for the purpose of transmitting and receiving a RF signals, —at least one centralized clock derived from at least one central oscillator; —at least one individual element located within said apparatus and having a EMI coupling with said RF transceiver, and which clocking is likely to generate spurs being modulated with the Tx carrier of said RF transceiver; Characterized in that it further includes: —a least one controllable clocking system for said at least one individual element; —a general control unit (UCM) for the purpose of performing a contextual analysis of the current mode of operation of said wireless telecommunications and, in response to said contextual analysis, for determining a clocking frequency which results in modulated Tx clock spurs out of the receive bands. | 11-22-2012 |
20120302182 | WIRELESS CURRENT SENSOR - The invention relates to a wireless current sensor ( | 11-29-2012 |
20120302183 | ANTENNA DIVERSITY APPARATUS - Apparatus for providing antenna diversity for a radio transmitter/receiver (TR) comprising measuring means for measuring relative received signal strengths in a plurality of antennas in a selectable frequency range, means for selecting the selectable frequency range according to a transmission frequency of the TR, and connecting means for connecting the antenna having the greatest received signal strength to the TR. The apparatus may be combined with a plurality of antennas to form a diversity antenna system, for example for use with a personal radio. The antennas may then be disposed spaced apart on the user's body e.g. by being incorporated into a garment. | 11-29-2012 |
20120302184 | COMMUNICATION APPARATUS, COMMUNICATION CONTROL METHOD AND COMMUNICATION CONTROL PROGRAM STORAGE MEDIUM - PURPOSE: To provide a communication apparatus which makes it possible to, when one communication means of a plurality of communication means performs a communication, prevent the occurrences of interference with the communication due to communications performed by the other communication means. | 11-29-2012 |
20120309328 | BROADBAND DISTRIBUTED ANTENNA SYSTEM WITH NON-DUPLEXER ISOLATOR SUB-SYSTEM - Certain aspects and aspects of the present invention are directed to a distributed antenna system having a downlink communication path, an uplink communication path, and a non-duplexer isolator sub-system. The downlink communication path can communicatively couple a transmit antenna to a base station. The uplink communication path can communicatively couple a receive antenna to the base station. In one aspect, the non-duplexer isolator sub-system can be electronically configured for isolating uplink signals traversing the uplink communication path from downlink signals. In another aspect, a non-duplexer isolator sub-system can be configurable in one or more mechanical steps selecting a frequency response. In another aspect, a non-duplexer isolator sub-system can include an active mitigation sub-system. | 12-06-2012 |
20130035046 | WIRELESS COMMUNICATION APPARATUS AND ELECTRONIC EQUIPMENT - Provided is a wireless communication apparatus including at least one two-way antenna for power recovery, a wireless block processing a wireless signal which the two-way antenna for power recovery transmits and receives, a power recovery block recovering electric power from a received signal of the two-way antenna for power recovery, and a connection switching part connecting the two-way antenna for power recovery to and switching the connection between the wireless block and the power recovery block. A duty ratio at which the connection switching part connects the two-way antenna for power recovery to the wireless block and the power recovery block is set so that the wireless block attains a desired communication speed. | 02-07-2013 |
20130040582 | WIRELESS COMMUNICATION DEVICE, HIGH-FREQUENCY CIRCUIT SYSTEM, AND LOCAL LEAK REDUCTION METHOD - A wireless communication device according to the present invention includes high-frequency circuits | 02-14-2013 |
20130045695 | TRANSMITTING AND RECEIVING RADIO SIGNALS IN VARIOUS FREQUENCY RANGES - A device transmits and receives radio signals, in particular radio signals in a cellular radio network. The device contains a first transmitting antenna for transmitting radio signals and a second receiving antenna. The antennas transmit and/or receive radio signals in different frequency ranges. The antennas are connected to a common cable connection via a radio signal splitter, by which cable connection the device can be connected to a radio terminal. The device contains a first radio signal amplifier disposed in a first radio signal path and/or a second radio signal amplifier disposed in a second radio signal path. The transmitting antenna and the receiving antenna have attenuation with respect to feedback of a radio signal transmitted from the transmitting antenna to the receiving antenna due to the arrangement thereof relative to each other and due to the transmitting and/or receiving characteristics thereof. | 02-21-2013 |
20130052968 | REDUCED CLOCK FEED-THROUGH SYSTEMS, METHODS AND APPARATUS - Implementations of radio frequency switch controllers within the scope of the appended claims are configured to reduce the impact of the clock signal induced spurs. In particular, implementations of switch controllers described herein include a poly-phase clocking scheme, as opposed to a single phase to clock the charge pump stages of an negative voltage generator. In some implementations poly-phase clocking schemes reduce the clock signal induced spurs and may preclude the need for additional on-chip or off-chip decoupling capacitors that add to the cost and physical size of a complete front end module solution. | 02-28-2013 |
20130059551 | ROUTING FOR A PACKAGE ANTENNA - An apparatus is provided. A plurality of transceiver antennas are arranged to form a phased array, where each antenna include a differential transmit antenna and a differential receive antenna arranged in a first pattern. A plurality of transceivers are arranged in a second pattern that is substantially symmetrical, and each transceiver is associated with at least one of the transceiver antennas and includes a feed network. Each feed network has a power amplifier (PA), a first matching network that is coupled between the PA and its associated transmit antenna so as to translate the phase of each differential transmit signal, a low noise amplifier (LNA), and a second matching network that is coupled between the LNA and its associated receive antenna so as to translate the phase of each differential receive signal. | 03-07-2013 |
20130065542 | Spectral Filtering Systems - A spectral transform system includes a first path having a signal input, a signal output, and an adjustable first path signal scaling block. A second path is connected to the forward path between the signal input and the signal output. The second path has an adjustable delay element and an adjustable second path signal scaling block. A detector is connected to the signal output for detecting properties of an output signal. A controller is connected to adjust the delay element, the second path signal scaling block, and the first path signal scaling block based on the properties detected by the detector to achieve a desired output signal. | 03-14-2013 |
20130072134 | ATTENUATING ANTENNA SWITCH AND COMMUNICATION DEVICE - An attenuating antenna switch may be used to suppress increase in the scale and power consumption of an RFIC. The antenna switch has a first terminal, a second terminal, and an antenna terminal coupled to the first and second terminals and configured to be connected to an antenna. The first switch switches between a first state in which a high frequency signal is propagated between the first terminal and the antenna terminal, and a second state in which the high frequency signal is interrupted. A second switch switches between the first and second states between the second terminal and the antenna terminal. The first and second switches are controlled in a mutually exclusive manner such that only one of the two switches can be in the first state at any given time. When in the first state, each switch adjusts an attenuation amount of the high frequency signal. | 03-21-2013 |
20130078931 | Transmit-Receive Front End - The present invention discloses a transmit-receive (TR) front end. The TR front end includes a low-noise amplifier (LNA); a power amplifier (PA); a transformer, coupled to the PA, for increasing a voltage swing and a power transmission of the PA; and a TR switch, coupled between the transformer and the LNA. The LNA is single ended and there is no transformer between the LNA and the TR switch. | 03-28-2013 |
20130095774 | METHOD FOR SELECTING STATE OF A RECONFIGURABLE ANTENNA IN A COMMUNICATION SYSTEM VIA MACHINE LEARNING - A method for selecting the state of a reconfigurable antenna installed at either the receiver or transmitter of a communication system is provided. The proposed method uses online learning algorithm based on the theory of multi-armed bandit to perform antenna state selection. The selection technique utilizes the Post-Processing Signal-to-Noise Ratio (PPSNR) as a reward metric and maximizes the long-term average reward over time. The performance of the learning based selection technique is empirically evaluated using wireless channel data. The data is collected in an indoor environment using a 2×2 MIMO OFDM system employing highly directional metamaterial Reconfigurable Leaky Wave Antennas. the learning based selection technique shows performance improvements in terms of average PPSNR and regret over conventional heuristic policies. | 04-18-2013 |
20130102261 | METHOD FOR CALIBRATING A BAND REJECTION FILTER OF A TERMINAL AND MULTISTANDARD TERMINAL WITH CALIBRATED BAND REJECTION FILTER - The present invention relates to a multimedia mobile terminal capable of transmitting and receiving signals compliant with several standards in the UHF band. It comprises:
| 04-25-2013 |
20130109331 | TRANSMIT/RECEIVE SWITCH WITH ESD PROTECTION AND METHODS FOR USE THEREWITH | 05-02-2013 |
20130115897 | FILTER BLOCK AND A SIGNAL TRANSCEIVER COMPRISING SUCH A FILTER BLOCK - A filter block comprising
| 05-09-2013 |
20130122830 | METHOD, APPARATUS AND SYSTEM FOR CONTROLLING DISTRIBUTED ANTENNA SYSTEM - A method for controlling a distributed antenna system includes the following steps. A target propagation delay value is defined according to a transmit/receive transition gap. Propagation delay time of a service antenna unit corresponding to a base station is estimated. The service antenna unit is turned on to perform downlink signal transmission, and the propagation delay time of the service antenna unit is compensated to the target propagation delay value. | 05-16-2013 |
20130122831 | COMMUNICATION SYSTEMS WITH ENHANCED ISOLATION PROVISION AND OPTIMIZED IMPEDANCE MATCHING - A communication system has multiple paths including one or more Tx paths for processing Tx signals and one or more Rx paths for processing Rx signals, one or more PAs coupled respectively to the one or more Tx paths for amplifying the Tx signals, one or more LNAs coupled respectively to the one or more Rx paths for amplifying the Rx signals, one or more Tx filters coupled respectively to the one or more Tx paths for filtering the Tx signals, one or more Rx filters coupled respectively to the one or more Rx paths for filtering the Rx signals, and an antenna comprising multiple feeds coupled to the multiple paths, respectively, to provide physical separation of the multiple paths from each other. Physical separation among the multiple paths and impedance matching provides isolation among the multiple paths, and relaxes rejection considerations on the filters. | 05-16-2013 |
20130130631 | WIRELESS COMMUNICATION DEVICE FOR SWITCHING ANTENNAS - A wireless communication device comprises a first antenna, a second antenna, a switch, and a balun. The first antenna and the second antenna transmit and receive signals. The wireless communication device can use only one antenna (the first antenna) or the two antennas (the first antenna and the second antenna) at the same time according to a comparison between received signal strength indications (RSSIs) of the antennas and a maximum input level of the wireless communication device. | 05-23-2013 |
20130137384 | COMMUNICATION SYSTEM WITH BAND, MODE, IMPEDANCE AND LINEARIZATION SELF-ADJUSTMENT - A communication system is provided, including an antenna, a PA, a linearization circuit to enhance linearity, a filter system, and a controller. The controller is configured to receive information on the signals and conditions, and based on the information the controller controls one or more of the antenna, the PA, the linearization circuit and the filter system to provide an optimum configuration to meet specifications of signal properties under the conditions. The controller may look up a registry having entries regarding the specifications of signal properties under conditions in terms of predetermined parameters. | 05-30-2013 |
20130137385 | TRANSCEIVER WITH PLURAL SPACE HOPPING ARRAY ANTENNAS AND METHODS FOR USE THEREWITH - A wireless transceiver includes an antenna array that transmits an outbound RF signal containing outbound data to remote transceivers and that receives an inbound RF signal containing inbound data from the remote RF transceivers, wherein the antenna array is configurable based on a control signal. An antenna configuration controller generates the control signal to configure the antenna array to hop among a plurality of radiation patterns based on a hopping sequence. An RF transceiver section generates the outbound RF signal based on the outbound data and that generates the inbound data based on the inbound RF signal. In one configuration, a switching section selectively couples a selected one of the antennas in the array to the RF transceiver section, based on the control signal. In another configuration, the RF transceiver section includes an RF section for each antenna in the array. | 05-30-2013 |
20130149975 | System and methods for performing antenna transmit diversity - A wireless electronic device may include switching circuits that perform time division duplexing by toggling between a first configuration in which radio-frequency signals received from antennas are routed to the transceivers and a second configuration in which the antennas are coupled to antenna switching circuitry. The antenna switching circuitry may receive radio-frequency transmission signals from the transceivers and route the transmission signals to a selected one of the antennas. The antenna switching circuitry may be controlled by control circuitry such as baseband circuitry and/or storage and processing circuitry on the device. The antenna switching circuitry may be controlled to accommodate antenna transmit diversity without affecting reception of radio-frequency signals, because the switching circuits that perform time division duplexing may form signal reception paths that are unaffected by the configuration of the antenna switching circuitry. | 06-13-2013 |
20130157591 | RF Transceiver - A signal generation and transmission system includes a modulator and an RF transceiver. The RF transceiver includes a voltage-controlled oscillator, a power divider, a low-pass filter, a low-noise amplifier and a mixer. The voltage-controlled oscillator receives a signal from the modulator and produces a frequency modulated continuous wave signal. The power divider receives the frequency modulated continuous wave signal from the voltage-controlled oscillator. The low-pass filter receives the frequency modulated continuous wave signal from the power divider. The low-noise amplifier receives, amplifies and transfers a target echo signal. The mixer combines the frequency modulated continuous wave signal from the power divider with the echo signal of target from the low-noise amplifier so that the two signals are added up or subtracted from each other in a frequency band. | 06-20-2013 |
20130157592 | Methods for Reducing Near-Field Radiation and Specific Absorption Rate (SAR) Values in Communications Devices - A method is provided for reducing near-field radiation and specific absorption rate values in a communications device that includes a multimode antenna structure transmitting and receiving electromagnetic signals and circuitry for processing signals communicated to and from the antenna structure. The method includes adjusting the relative phase between signals fed to neighboring antenna ports of the antenna structure such that a signal fed to the one antenna port has a different phase than a signal fed to the neighboring antenna port to provide antenna pattern control and to increase gain in a selected direction toward a receive point. The method features using a transmit power lower than the transmit power used in a non-pattern control operation of the antenna structure such that the communications device obtains generally equivalent wireless link performance with the receive point using reduced transmit power compared to the non-pattern control operation, thereby reducing the specific absorption rate. | 06-20-2013 |
20130171948 | MULTI-FREQUENCY BAND ANTENNA FEEDER SHARING METHOD AND BASE STATION RADIO FREQUENCY UNIT - Embodiments of the present disclosure provide a multi-frequency band antenna feeder sharing method and a base station radio frequency unit. The method includes: receiving a signal of a frequency band 1 and a signal of a frequency band 2 through an antenna feeder, transmitting the signals to a band-pass filter and filtering the signals so as to obtain the signal of the frequency band 2, and transmitting the signal of the frequency band 2 to a third radio frequency port through a combiner port; and/or, sending the signal of the frequency band 2 to the combiner port through the third radio frequency port, transmitting the signal of the frequency band 2 that has passed through the band-pass filter to the port of the first radio frequency channel, and sending out the signal of the frequency band 2, together with the signal of the frequency band 1. | 07-04-2013 |
20130178173 | APPARATUS AND METHOD FOR MINIMIZING AMPLIFIER OSCILLATION IN AN ANTENNA SYSTEM - Embodiments of an apparatus for minimizing oscillation of an amplifier in an antenna system are provided. These embodiments can comprise passive circuitry in the form of a coupling simulator that includes passive elements selected and combined to generate an output with properties that can cancel or substantially reduce a coupled input as between two antennas in the antenna system. In one example, the coupling simulator may include a phase-shifting device and an attenuating device, each of which have properties with values selected based on parameters that result from the relationship between the antennas of the antenna system. | 07-11-2013 |
20130183911 | CONFIGURABLE ANTENNA STRUCTURE - A configurable antenna structure includes a plurality of switches, a plurality of antenna components, and a configuration module. The configuration module is operable to configure the plurality of switches and the plurality of antenna components into a first antenna for receiving a multiple frequency band multiple standard (MFBMS) signal. The configuration module continues processing by identify a signal component of interest of a plurality of signal components of interest within the MFBMS signal. The configuration module continues processing by configuring the plurality of switches and the plurality of antenna components into a second antenna. | 07-18-2013 |
20130196609 | Process for Achieving Spur Mitigation in an Integrated Circuit Including a Wide Band Receiver - A radio transceiver including—an antenna ( | 08-01-2013 |
20130210374 | ANTENNA DUPLEXER AND COMMUNICATION DEVICE USING THE SAME - An antenna duplexer includes a transmission filter and a reception filter both coupled with an antenna terminal. A pass band of the transmission filter is lower than a pass band of the reception filter. The transmission filter includes a first series resonator coupled with a first terminal, a second series resonator connected to the first series resonator at a first node, a first parallel resonator connected to a first port of the first series resonator, a second parallel resonator connected to a first node and the first parallel resonator at a second node, a third parallel resonator connected to the first node, a fourth parallel resonator connected to the third parallel resonator at a third node, a first inductance element coupled with the second node and a ground, and a second inductance element coupled with the third node and the ground. The inductance of the second inductance element is lower than the inductance of the first inductance element. In this antenna duplexer, the transmission filter sufficiently suppresses a spurious caused by harmonics contained in a transmission signal. | 08-15-2013 |
20130217344 | INTEGRATED CIRCUIT AND WIRELESS COMMUNICATION APPARATUS - Provided is an integrated circuit including a first switch element provided on a transmission path, a second switch element provided on a reception path, a third switch element provided between an input-side node of the first switch element and a ground potential, and a fourth switch element provided between an output-side node of the second switch element and the ground potential. The second switch element and the third switch element are turned on when the first switch element and the fourth switch element are turned off. The second switch element and the third switch element are turned off when the first switch element and the fourth switch element are turned on. An output-side node of the first switch element is connected to an input-side node of the second switch element, and a size of the first switch element is smaller than a size of the second switch element. | 08-22-2013 |
20130225099 | METHODS, SYSTEMS, AND NON-TRANSITORY COMPUTER READABLE MEDIA FOR WIDEBAND FREQUENCY AND BANDWIDTH TUNABLE FILTERING - Methods, systems, and computer readable media for wideband frequency and bandwidth tunable filtering are disclosed. According to one aspect, the subject matter described herein includes a wideband frequency and bandwidth tunable filter that splits a filter input signal into first and second input signals, modifies the first input signal to produce a first output signal, modifies the second input signal to produce a second output signal having an intermediate frequency response, and combines the first and second output signals while adjusting their relative phases and/or amplitudes to produce a filter output signal with the target frequency response. Adjustment includes splitting the second input signal into third and fourth input signals, which are modified and then combined to produce the second output signal having the intermediate frequency response. | 08-29-2013 |
20130225100 | METHODS AND APPARATUS FOR WIRELESS DEVICE COEXISTENCE - Methods and apparatus for compensating for the effects of interference between multiple wireless communication apparatus. In one embodiment, the method comprises providing a first wireless communication apparatus operating in a first band and a second wireless communication apparatus operating at least partly in the first band, where the second wireless communication apparatus operates according to a different communication protocol than the first wireless communication apparatus. Interference is compensated for between the first wireless communication apparatus and the second wireless communication apparatus by selecting and operating according to one of a plurality of operational protocols. In another embodiment, the first wireless communication apparatus and the second wireless communication apparatus operate in a closed-loop relationship to cooperatively compensate for communication interference. | 08-29-2013 |
20130237164 | RADIO FREQUENCY MODULES CAPABLE OF SELF-CALIBRATION - A radio frequency (RF) module capable of self-calibration is provided. According to an embodiment, the RF module includes an RF signal processor, a plurality of RF signal paths, an antenna switch module (ASM), and a power detector. The RF signal paths are connected between the RF signal processor and the ASM. The ASM has an antenna port and selectively connects the RF signal processor to the antenna port through one of the RF signal paths. The power detector is operative to detect power of an RF transmission signal that exits the antenna port of the ASM and enters an antenna when the ASM connects an RF transmission path of the RF signal paths to the antenna port of the ASM. | 09-12-2013 |
20130237165 | MOBILE TERMINAL AND RADIO FREQUENCY STRUCTURE THREROF - A radio frequency (RF) structure of a mobile terminal provided in the present invention includes: a plurality of frequency band modules having different frequency band properties, respectively; antennas are respectively configured to match the frequency band modules; and antenna switches are configured to connect a plurality of emitting and receiving signals of the frequency band modules with the antennas. According to the structure described above, the RF structure of the mobile terminal provided in the present invention can optimize the design to match multiple antennas to reduce cost and enhance the RF performance. | 09-12-2013 |
20130244593 | Agile and Adaptive Transmitter-Receiver Isolation - The disclosed invention relates to a transceiver system having one or more receive antennas that receive a first radio frequency (RF) signal and a plurality of transmit antennas that wirelessly transmit a second RF signal. A local channel determination unit provides data corresponding to the environment of local communication channels (i.e., the communication channels between the transmit antennas and the receive antennas) to a beamforming element, which enables beamforming functionality within the transmit and/or receive antennas (e.g., by using analog or digital weights to vary the radiation pattern generated by the transmit antennas) so as to attenuate RF signals extending between the transmit antennas and the receive antennas. By attenuating signals extending between the transmit and the receive antennas, a high degree of isolation is achieved between transmission and reception paths | 09-19-2013 |
20130244594 | Agile and Adaptive Wideband MIMO Antenna Isolation - The disclosed invention relates to a MIMO (multiple input, multiple output) wideband transceiver. In some cases, the MIMO wideband transceiver comprises a signal processor that outputs or receives a plurality of distinguishable data streams. A first data stream is provided to a first antenna port connected to a plurality of wideband antennas, while a second data stream is provided to a second antenna port connected to a wideband antenna. A spatial filter element configured to assign antenna weights to the plurality of wideband antennas, which cause the wideband antennas to operate in a manner that attenuates wireless signals, at a frequency range at which the wideband transmit wideband radiate, in the direction of the wideband antenna without attenuating the wireless signals in other directions. By attenuating signals extending between the plurality of wideband antennas and the wideband antenna, wideband decoupling between first and second antenna ports is achieved. | 09-19-2013 |
20130244595 | RF SWITCH IMPLEMENTATION IN CMOS PROCESS - A dual pole dual through switch for switching between at least four states. The switch comprises four transistors such as N-channel Metal Oxide Semiconductor transistors, such that at each state at most one transistor is in “on” state, and the others are in “off” state. Each transistor has its own control circuit, which provides zero or negative voltage to the drain of the transistor, positive voltage to the source of the transistor, and control alternating voltage to the gate of the transistor. The switch can be used on-chip for devices. Such devices may include a base station or a handset of a cordless phone. | 09-19-2013 |
20130252561 | 3D Antenna Assembly with Projected AMC and Applications Thereof - An antenna assembly a spiral antenna feed and a programmable circuit. The spiral antenna feed includes a substrate, a spiral antenna element, and a feed point. The substrate has a three-dimensional hyperbolic shaped region, which supports the spiral antenna element such that the spiral antenna element has an overall shape approximating a three-dimensional hyperbolic shape. The feed point is coupled to a connection point of the spiral antenna element. The programmable circuit produces a projected artificial magnetic conductor reflector dish that reflects an inbound RF signal to the spiral antenna feed and reflects an outbound RF signal from the spiral antenna feed. | 09-26-2013 |
20130252562 | HIGH POWER HIGH ISOLATION LOW CURRENT CMOS RF SWITCH - A novel and useful RF switch that comprises four transistors configured to have four operating states, wherein at any time at most one transistor is in ‘on’ state. The switch is an on-chip switch and is constructed in using CMOS processes and technology. The switch is optionally a double pole, double throw (DPDT) switch. The switch can be used in numerous mobile devices such as a cellular phone or in the handset or base station of a cordless phone. The switch optionally selects between two antennas and between transmitter and receiver circuits. Within the switch, at least one of the at least four transistors is optionally an N-channel Metal Oxide Semiconductor (NMOS) transistor. The switch can further comprise one or more logic control circuits providing biasing voltages to one or more of the transistors. Within the switch, the control circuit comprises logic components for providing appropriate biasing voltages to the drain, source and gate terminals of the transistors in the switch. | 09-26-2013 |
20130260698 | SWITCHING CIRCUIT - A method for controlling a switch based on transistors is disclosed. A switching circuit for switching a signal from an input port to an output port thereof is provided. A shunting circuit for switchably shunting the signal from the input port to ground is also provided. A control signal is generated for biasing a control port of the shunting circuit and an approximately complimentary control signal is generated for biasing of the switching circuit to either shunt a signal received at the input port or to switch the signal to the output port. A further bias signal for biasing a port within the switching circuit along the signal path between the input port and the output port is also provided. | 10-03-2013 |
20130267185 | TRANSCEIVER HAVING AN ON-CHIP CO-TRANSFORMER - A transceiver formed on an integrated-circuit substrate is disclosed. The transceiver includes: a co-transformer comprising first, second and third windings which wrap each other but are separated from each other; a power amplifier coupled to the co-transformer; and a low-noise amplifier coupled to the co-transformer; wherein the co-transformer is configured for converting a first signal from the power amplifier into a second signal to be transmitted by an antenna when the transceiver is in its transmitter mode, and for converting a third signal from the antenna into a fourth signal to be outputted to the low-noise amplifier when the transceiver is in its receiver mode. | 10-10-2013 |
20130273859 | SYSTEMS AND METHODS RELATED TO IMPROVED ISOLATION BETWEEN TRANSMIT AND RECEIVE RADIO-FREQUENCY SIGNALS - Disclosed are systems and methods for improving isolation between transmit and receive radio-frequency (RF) signals. In some embodiments, a system can be implemented for isolating RF signals during Tx and Rx operations. The system can include a Tx path and an Rx path, with the Tx path having a filter. In some embodiments, the Tx path can include a power amplifier having a plurality of interstages and an output stage, and the filter can be implemented at one of the interstages and before the output stage. The system can further include first and second antennas connected respectively to the Tx and Rx paths. The Tx path, the Rx path, and/or the first and second antennas can be configured to yield a desired level of isolation between the RF signal in the Tx and Tx paths. | 10-17-2013 |
20130273860 | SYSTEMS AND METHODS FOR REDUCING FILTER INSERTION LOSS WHILE MAINTAINING OUT-OF-BAND ATTENUATION - Disclosed are systems and methods for reducing filter insertion loss while maintaining out-of-band attenuation. In some embodiments, a system can be configured for processing of radio-frequency (RF) signals. The system can include a plurality of signal paths configured to accommodate multiple frequency bands, with each of the multiple bands having a passband. The system can further include a filter circuit disposed along each of the signal paths. At least one of the filter circuits can be segmented into two or more segments that substantially cover the passband corresponding to the filter circuit. The segmented filter circuit can be configured to provide a desired attenuation of out-of-band interferers and a desired insertion loss level. In some embodiments, the signal paths can include receive (Rx) paths. | 10-17-2013 |
20130281033 | INTERFACE FOR COMMUNICATION BETWEEN VOLTAGE DOMAINS - One or more embodiments provide circuitry for isolation and communication of signals between circuits operating in different voltage domains using capacitive coupling. The embodiments utilize capacitive structures having increased breakdown voltage in comparison to previous parallel plate implementations. The capacitive isolation is provided by parallel plate capacitive structures, each implemented to have parallel plates of different horizontal sizes. Due to the difference in horizontal size, edges of the parallel plates, where electric fields are the strongest, are laterally offset from the region where the parallel plates overlap. As a result, breakdown voltage between the parallel plates is increased. | 10-24-2013 |
20130288617 | Circuit for Controlling Switching Time of Transmitting and Receiving Signal in Wireless Communication System - Disclosed herein is a circuit for controlling a switching time of a transmitting and receiving signal in a wireless communication system including: a high speed switch circuit unit receiving a signal transceived through an antenna to perform a high speed switching operation; a low speed switch circuit unit the signal transceived through the antenna to perform a low speed switching operation; and a controlling unit applying a control signal for controlling a switching time to the high speed switch circuit unit or the low speed switch circuit unit. | 10-31-2013 |
20130303093 | RF Switches - RF switching devices are provided that alternatively couple an antenna to either a transmitter amplifier or a receiver amplifier. An exemplary RF switching device comprises two valves, one for a receiver transmission line between the antenna and the receiver amplifier, the other for a transmitter transmission line between the antenna and the power amplifier. Each valve is switchably coupled between ground and its transmission line. When coupled to ground, current flowing through the valve increases the impedance of the transmission line thereby attenuating signals on the transmission line. When decoupled from ground, the impedance of the transmission line is essentially unaffected. The pair of valves is controlled such that when one valve is on the other valve is off, and vice versa, so that the antenna is either receiving signals from the power amplifier or the receiver amplifier is receiving signals from the antenna. | 11-14-2013 |
20130309981 | SYSTEMS, APPARATUS, AND METHODS FOR ANTENNA SELECTION - This disclosure provides systems, methods, and apparatus for mobile transmit diversity. In one aspect, a wireless communication apparatus is provided. The wireless communication apparatus includes a transmit circuit configured to transmit wireless communications via either a first antenna or a second antenna. The wireless communication apparatus further includes a receive circuit configured to receive wireless communications using either the first antenna or the second antenna. The wireless communication apparatus further includes a controller configured to switch the transmit circuit and the receive circuit from transmitting and receiving wireless communications via the first antenna to transmit and receive wireless communications via the second antenna in response to detecting that a first receive power level of the first antenna is less than a second receive power level of the second antenna and a difference between the second receive power level and the first receive power level is greater than a threshold. | 11-21-2013 |
20130316663 | MATCHING DEVICE, TRANSMITTING AMPLIFIER, AND WIRELESS COMMUNICATION DEVICE - A first signal path has one or a plurality of coils arranged in series, the coils being connected to the output of a first amplifier. A second signal path has the same number of coils as the coils of the first signal path, the coils being arranged in series and connected to the output of a second amplifier. Coupling paths have capacitors and couple the first signal path and the second signal path at both ends of the corresponding coils on the first signal path and the second signal path. A SW controlling unit switches a switch to a contact when a signal is input from the first amplifier and switches the switch to a contact when a signal is input from the second amplifier. | 11-28-2013 |
20130331043 | HIGH LINEARITY TX/RX SWITCH - A TX/RX switch includes a first switching device connectable with a power amplifier and a second switching device connectable with a low noise amplifier. Both the first switching device and the second switching device are operating in an ON state in transmit mode to provide substantial linearity including no significant alternating current signal swing across any two nodes of the first switching device and the second switching device in the ON state. | 12-12-2013 |
20130337752 | RF FRONT-END CIRCUITRY FOR RECEIVE MIMO SIGNALS - RF front-end circuitry arranged to provide for RF Multiple-Input and Multiple-Output (MIMO) signals is disclosed. In one embodiment, the RF front-end circuitry may include an antenna port, a first multiple throw (MT) switch, and a second MT switch. The first MT switch is configured to selectively couple a first pole port to any one of a first set of throw ports, and the second MT switch is configured to selectively couple a second pole port to any one of a second set of throw ports. The first pole port of the first MT switch is coupled to the antenna port. More than one of the second set of throw ports of the second MT switch are coupled to transmit one or more receive MIMO signals to RF transceiver circuitry. Accordingly, the RF front-end circuitry routes receive MIMO signals from the antenna port to the RF transceiver circuitry. | 12-19-2013 |
20130337753 | ANTENNA SWITCHING CIRCUITRY FOR A WORLDPHONE RADIO INTERFACE - This disclosure relates to radio frequency (RF) front-end circuitry. In one embodiment, the RF front-end circuitry is arranged to provide antenna switching functionality for a Worldphone or a World tablet. The RF front-end circuitry may include front-end switching circuitry, a multiple throw microelectromechanical switch (MTMEMS), a first antenna port, a second antenna port, and a third antenna port. The front-end switching circuitry of the RF front-end circuitry is configured to selectively couple one or more RF ports to either the first antenna port or the second antenna port. The MTMEMS is configured to selectively couple a pole port coupled to the third antenna port to any one of a set of throw ports, which may be RF ports or may be coupled to RF ports. As such, the RF front-end circuitry is capable of providing antenna switching functionality between three antennas for a Worldphone or World tablet. | 12-19-2013 |
20130337754 | FRONT END SWITCHING CIRCUITRY FOR CARRIER AGGREGATION - This disclosure relates generally to radio frequency (RF) front-end circuitry for different types of carrier aggregation, along with methods of operating the same. In one embodiment, the RF front-end circuitry includes a first diplexer, a second diplexer, first antenna selection circuitry, and second antenna selection circuitry. In order to maintain adequate isolation between high bands and low bands but provide carrier aggregation, the first antenna selection circuitry is configured to selectively couple each of a first plurality of RF ports to any one of a first low band port in the first diplexer and a second low band port in the second diplexer, while the second antenna selection circuitry is configured to selectively couple each of the second plurality of RF ports to any one of a first high band port in the first diplexer and a second high band port in the second diplexer. | 12-19-2013 |
20130344819 | VERSATILE COMMUNICATION SYSTEM AND METHOD OF IMPLEMENTATION USING HETEROGENEOUS INTEGRATION - A communication system front-end architecture and a method of fabricating same are disclosed in which a diverse set of semiconductor technologies and device types (including CMOS, SiGe CMOS, InP HBTs (heterojunction bipolar transistors), InP HEMTs (high electron mobility transistors), GaN HEMTs, SiC devices, any number from a diverse set of MEMS sensors and actuators, and potentially photonics) is merged onto a single silicon, or other material substrate to thereby enable the development of smaller, lighter, and higher performance systems. | 12-26-2013 |
20130344820 | FRONT-END CIRCUIT - The present invention concerns a front-end circuit (FEC) that is connectable to at least two radiators (RAD | 12-26-2013 |
20140004805 | Noise Reduction and Tilt Reduction in Passive FET Multi-Phase Mixers | 01-02-2014 |
20140004806 | SYSTEM AND METHOD FOR WIRELESS COMMUNICATIONS | 01-02-2014 |
20140011461 | System and Method for Attenuating a Signal in a Radio Frequency System - In accordance with an embodiment, a method includes coupling power from a transmitter to form a first signal, conditioning the first signal to form a second signal, and coupling the second signal to an input of a receiver. Conditioning includes adjusting the second signal to combine in anti-phase with a leakage signal coupled from the transmitter to the input of the receiver such that the leakage signal is attenuated. | 01-09-2014 |
20140018014 | Transceiver Device - A transceiver for RF signals uses receiving circuitry to derive control signals to reduce undesired signal frequencies in the output of the transmitting circuitry. | 01-16-2014 |
20140024322 | RADIO FRONT END HAVING REDUCED DIVERSITY SWITCH LINEARITY REQUIREMENT - A radio front end that includes a diversity switch module adapted to route diversity receive (RX) signals to transceiver circuitry from diversity antenna switch circuitry coupled to at least one diversity antenna port is disclosed. The radio front end further includes ultrahigh band (UHB) switch circuitry adapted to route UHB transmit (TX) signals from power amplifier and switch circuitry to a UHB antenna port and/or to at least one diversity antenna port. The UHB switch circuitry is also adapted to route UHB RX signals from the UHB antenna port and/or to at least one antenna port to the transceiver circuitry, wherein the UHB RX signals include band 7 (B7) wherein linearity of the UHB switch circuitry is greater than linearity of the diversity switch module. | 01-23-2014 |
20140030988 | SECOND-ORDER INTERMODULATION DISTORTION CALIBRATION APPARATUS, SYSTEM AND METHOD - A second-order intermodulation distortion calibration apparatus is provided. The calibration apparatus is applied to a radio-frequency (RF) transceiver, which includes a transmitter for providing an RF signal, and a receiver that is at the same time a target to be calibrated. The calibration apparatus includes a calibrator. The calibrator utilizes a logic circuit in the transmitter to generate two modulation signals having different frequencies, and utilizes two transmission paths to up-convert and combine the two modulation signals to an RF transmission signal. The calibrator further channels the RF transmission signal to the receiver to accordingly adjust second-order non-linear behaviors of the receiver and to detect a signal strength of a second-order crossover component caused by the receiver due to the second-order non-linearity. After the calibration process, the calibrator provides a control signal to minimize the signal strength of the second-order crossover component. | 01-30-2014 |
20140038532 | MOBILE WIRELESS COMMUNICATIONS DEVICE WITH LNA FRONT END CIRCUIT AND RELATED METHODS - A mobile wireless communications device may include an antenna, LTE RF differential inputs, and a front end circuit. The front end circuit may include band pass filters coupled to the antenna, LNAs coupled respectively to the band pass filters, and RF switching circuits. Each RF switching circuit may be respectively coupled between each LNA and a pair of LTE RF differential inputs and configured to switch to one or both of the pair of LTE RF differential inputs. | 02-06-2014 |
20140045441 | Transceiver and Noise Cancellation Method for Radio-Frequency Identification - A transceiver for radio-frequency identification (RFID) is provided. The transceiver includes a transmitter, a receiver and a noise canceller. The transmitter transmits a carrier signal to an antenna. The receiver receives a wireless signal from the antenna. The noise canceller generates a feedback current according to a part of the carrier signal, and feeds the feedback current to an input of the receiver to cancel noises in the wireless signal. Further, the noise canceller adjusts the feedback current according to the signal strength of the noises in the wireless signal. | 02-13-2014 |
20140045442 | ELECTROMAGNETIC FIELD TRANSMITTING AND RECEIVING ANTENNAE ARRANGEMENT - A method for minimizing an interfering current induced in an antenna receiving an electromagnetic field, where the field is generated by a transmitting antenna located near the receiving antenna. The receiving antenna is arranged relative to the transmitting antenna such that the induced current is at least partially cancelled out in the receiving antenna. The invention also relates to an antenna arrangement and to a device comprising the same. | 02-13-2014 |
20140051367 | HIGH-FREQUENCY CIRCUIT MODULE - Provided is a high-frequency module that can prevent a transmission signal from reaching a reception circuit and that can achieve high mounting density. A first duplexer for a first frequency band is mounted on a circuit substrate, and a second transmission filter and a second reception filter that constitute a second duplexer for a second frequency band are embedded in the circuit substrate. The second transmission filter and the second reception filter are embedded in the circuit substrate in locations that overlap at least a part of a projection region that is formed by projecting the first duplexer in a thickness direction of the circuit substrate. The first frequency band and the second frequency band are separated from each other by at least a prescribed frequency range. | 02-20-2014 |
20140051368 | HIGH-FREQUENCY CIRCUIT MODULE - Provided is a high-frequency module that can prevent a transmission signal from reaching a reception circuit and that can achieve high mounting density. A first duplexer for a first frequency band is mounted on a circuit substrate, and a second transmission filter and a second reception filter that constitute a second duplexer for a second frequency band are embedded in the circuit substrate. The second transmission filter and the second reception filter are embedded in the circuit substrate in locations that overlap at least a part of a projection region that is formed by projecting the first duplexer in a thickness direction of the circuit substrate. The first frequency band and the second frequency band are separated from each other by at least a prescribed frequency range. | 02-20-2014 |
20140051369 | HIGH-FREQUENCY CIRCUIT MODULE - Provided is a high-frequency module that can prevent a transmission signal from reaching a reception circuit and that can achieve high mounting density. A first duplexer for a first frequency band is mounted on a circuit substrate, and a second transmission filter and a second reception filter that constitute a second duplexer for a second frequency band are embedded in the circuit substrate. The second transmission filter and the second reception filter are embedded in the circuit substrate in locations that overlap at least a part of a projection region that is formed by projecting the first duplexer in a thickness direction of the circuit substrate. The first frequency band and the second frequency band are separated from each other by at least a prescribed frequency range. | 02-20-2014 |
20140051370 | HIGH-FREQUENCY CIRCUIT MODULE - Provided is a high-frequency module that can prevent a transmission signal from reaching a reception circuit and that can achieve high mounting density. A first duplexer for a first frequency band is mounted on a circuit substrate, and a second transmission filter and a second reception filter that constitute a second duplexer for a second frequency band are embedded in the circuit substrate. The second transmission filter and the second reception filter are embedded in the circuit substrate in locations that overlap at least a part of a projection region that is formed by projecting the first duplexer in a thickness direction of the circuit substrate. The first frequency band and the second frequency band are separated from each other by at least a prescribed frequency range. | 02-20-2014 |
20140051371 | HIGH-FREQUENCY CIRCUIT MODULE - Provided is a high-frequency module that can prevent a transmission signal from reaching a reception circuit and that can achieve high mounting density. A first duplexer for a first frequency band is mounted on a circuit substrate, and a second transmission filter and a second reception filter that constitute a second duplexer for a second frequency band are embedded in the circuit substrate. The second transmission filter and the second reception filter are embedded in the circuit substrate in locations that overlap at least a part of a projection region that is formed by projecting the first duplexer in a thickness direction of the circuit substrate. The first frequency band and the second frequency band are separated from each other by at least a prescribed frequency range. | 02-20-2014 |
20140065983 | COMMUNICATION TERMINAL WITH ANTENNA SWITCHING FUNCTION AND METHOD FOR AUTOMATICALLY SWITCHING BETWEEN ANTENNAS - A method for switching among antennas of a communication terminal includes receiving acceleration values periodically sensed by an accelerometer. The acceleration values indicate amount of changes in orientation of the communication terminal such as when a user changes from a standing up position to a laying down position. A difference value is calculated between a current acceleration value and a previous acceleration value. When the difference value is greater than a predetermined value, a switching unit is controlled to switch between a first antenna and a second differently oriented antenna, so that a best in use antenna orientation is maintained for best communication regardless of orientation of the communication terminal. | 03-06-2014 |
20140065984 | TRANSMIT-RECEIVE SWITCHING CIRCUIT AND WIRELESS DEVICE - A transmit-receive switching circuit provided between a transmitter circuit configured to generate a transmission signal to be transmitted from an antenna and a receiver circuit configured to receive a reception signal received by the antenna, a transistor input control circuit configured to make the transmitter generate a transmission signal by an amplifying operation of a transistor in an output stage of the transmitter circuit when the transmission signal is transmitted from the antenna, and to short-circuit an output terminal of the transmitter circuit to a ground voltage when the reception signal is received by the antenna. | 03-06-2014 |
20140073266 | METHODS, SYSTEMS, AND NON-TRANSITORY COMPUTER READABLE MEDIA FOR WIDEBAND FREQUENCY AND BANDWIDTH TUNABLE FILTERING - Methods, systems, and computer readable media for wideband frequency and bandwidth tunable filtering are disclosed. According to one aspect, the subject matter described herein includes a wideband frequency and bandwidth tunable filter that splits a filter input signal into first and second input signals, modifies the first input signal to produce a first output signal, modifies the second input signal to produce a second output signal having an intermediate frequency response, and combines the first and second output signals while adjusting their relative phases and/or amplitudes to produce a filter output signal with the target frequency response. Adjustment includes splitting the second input signal into third and fourth input signals, which are modified and then combined to produce the second output signal having the intermediate frequency response. | 03-13-2014 |
20140080427 | SYSTEM-LEVEL ADAPTIVE MINIMIZATION OF INTERFERENCE IN MULTI-FUNCTION RADIOS - A method and apparatus that mitigates self-interference among various receivers and transmitters in a multifunction radio includes a transmitter operating in a first frequency band and a receiver operating in a second frequency band, different from the first frequency band. Jamming factors for multiple frequency channels in the first frequency band are calculated based on possible interference with the second frequency band by artifacts of the respective frequency channels. The frequency channel having the smallest jamming factor is selected as the frequency to be used by the transmitter. | 03-20-2014 |
20140087671 | Radio Frequency Front End Module Circuit Incorporating An Efficient High Linearity Power Amplifier - A novel and useful radio frequency (RF) front end module (FEM) circuit that provides high linearity and power efficiency and meets the requirements of modern wireless communication standards such as 802.11 WLAN, 3G and 4G cellular standards, Bluetooth, ZigBee, etc. The configuration of the FEM circuit permits the use of common, relatively low cost semiconductor fabrication techniques such as standard CMOS processes. The FEM circuit includes a power amplifier made up of one or more sub-amplifiers having high and low power circuits and whose outputs are combined to yield the total desired power gain. An integrated multi-tap transformer having primary and secondary windings arranged in a novel configuration provide efficient power combining and transfer to the antenna of the power generated by the individual sub-amplifiers. | 03-27-2014 |
20140087672 | CMOS Based RF Antenna Switch - A novel and useful radio frequency (RF) front end module (FEM) circuit that provides high linearity and power efficiency and meets the requirements of modern wireless communication standards such as 802.11 WLAN, 3G and 4G cellular standards, Bluetooth, ZigBee, etc. The configuration of the FEM circuit permits the use of common, relatively low cost semiconductor fabrication techniques such as standard CMOS processes. The FEM circuit includes a power amplifier made up of one or more sub-amplifiers having high and low power circuits and whose outputs are combined to yield the total desired power gain. An integrated multi-tap transformer having primary and secondary windings arranged in a novel configuration provide efficient power combining and transfer to the antenna of the power generated by the individual sub-amplifiers. | 03-27-2014 |
20140087673 | CMOS Based TX/RX Switch - A novel and useful radio frequency (RF) front end module (FEM) circuit that provides high linearity and power efficiency and meets the requirements of modern wireless communication standards such as 802.11 WLAN, 3G and 4G cellular standards, Bluetooth, ZigBee, etc. The configuration of the FEM circuit permits the use of common, relatively low cost semiconductor fabrication techniques such as standard CMOS processes. The FEM circuit includes a power amplifier made up of one or more sub-amplifiers having high and low power circuits and whose outputs are combined to yield the total desired power gain. An integrated multi-tap transformer having primary and secondary windings arranged in a novel configuration provide efficient power combining and transfer to the antenna of the power generated by the individual sub-amplifiers. | 03-27-2014 |
20140099904 | SWITCHABLE FILTERING CIRCUIT AND THE OPERATION METHOD USING THE SAME - The disclosure provides a switchable filtering circuit and the related operation method, in particular related to a filtering circuit which can be used for Bluetooth system and wireless local area network system. By using a first switch, a hybrid filtering circuit and a second switch, the received mode and transmitted mode between these two systems is realized. Moreover, the frequency responses and the bandwidth adjustments can be controlled according to the plurality of switchable resistors, the plurality of switchable capacitors and the shared and switchable resistors within the hybrid filter circuit. Moreover, the effects of high operated freedom of the circuit and the circuit size reduction can be achieved. | 04-10-2014 |
20140106684 | TRANSPARENT ANTENNAS ON A DISPLAY DEVICE - This disclosure provides systems, methods and apparatus for a display device with at least one transparent antenna. In one aspect, a transparent antenna is formed on the surface of a transparent substrate and is cooperatively coupled with a second antenna. The transparent antenna can avoid substantial interference with images produced by the display device. | 04-17-2014 |
20140106685 | SWITCHING SYSTEM WITH LINEARIZING CIRCUIT - A transistor-based switch is coupled to a replica circuit that includes transistor circuitry similar to that of the switch. The replica circuit biases a switched transistor to promote linear operation of the switch. | 04-17-2014 |
20140106686 | METHODS AND SYSTEMS FOR HIGH CAPACITY WIRELESS BROADBAND DELIVERY - System enhancement(s) are disclosed that can add capabilities, such as, using Frequency Division Multiple Access (FDMA) and/or Time Division Multiple Access (TDMA) and/or Frequency Division Duplex (FDD) capabilities along with Multi-Input Multi-Output (MIMO) antennas and/or Global Positioning System (GPS) synchronization. The use of two radios in both the base-station and the subscriber-station, i.e., customer premises equipment (CPE), e.g., can allow frequency division to be utilized, exploiting higher receive gains at the CPE while not affecting transmissions occurring on the other radio's frequency. | 04-17-2014 |
20140113573 | AMPLIFIERS WITH SHUNT SWITCHES - Amplifiers with shunt switches to mitigate interference are disclosed. In an exemplary design, an apparatus includes an amplifier and a shunt switch. The amplifier has an input operatively coupled to an input/output (I/O) pad of an integrated circuit (IC) chip. The shunt switch grounds the amplifier when the shunt switch is closed. The shunt switch is isolated from the I/O pad and the amplifier input. The amplifier may be a low noise amplifier (LNA) or some other type of amplifier. In an exemplary design, the shunt switch is isolated from the I/O pad by a series switch. The series switch and the shunt switch may be closed when the amplifier is disabled and may be opened when the amplifier is enabled. | 04-24-2014 |
20140113574 | CIRCUIT ASSEMBLY - The present invention relates to a circuit assembly which comprises an antenna path (A | 04-24-2014 |
20140113575 | DELTA SIGMA MODULATOR, AS WELL AS RECEIVER DEVICE AND WIRELESS COMMUNICATION DEVICE PROVIDED WITH SAME - A delta sigma modulator includes a filter circuit including an integrator having an operational amplifier; a first addition circuit provided between an output section of the filter circuit and an input section of a quantizer, and including a first resistive element; and a second addition circuit including at least one of a first feedforward circuit including a second resistive element or a first feedback circuit configured to feed back, as an analog signal, a digital output signal having been quantized by the quantizer, to an input section of the quantizer, wherein at least one of the first addition circuit or the first feedback circuit includes a phase compensator. | 04-24-2014 |
20140128008 | Same-Aperture Any-Frequency Simultaneous Transmit And Receive Communication System - A same-aperture any-frequency simultaneously transmit and receive (STAR) system includes a signal connector having a first port electrically coupled to an antenna, a second port electrically coupled to a transmit signal path, and a third port electrically coupled to receive signal path. The signal connector passes a transmit signal in the transmit signal path to the antenna and a receive signal in the receive signal path. A signal isolator is positioned in the transmit signal path to remove a residual portion of the receive signal from transmit signal path. An output of the signal isolator provides a portion of the transmit signal with the residual portion of the receive signal removed. A signal differencing device having a first input electrically coupled to the output of the signal isolator and a second input electrically coupled to the third port of the signal connector subtracts a portion of the transmit signal in the receive signal path thereby providing a more accurate receive signal. | 05-08-2014 |
20140134963 | TRACKING SYSTEM WITH ORTHOGONAL POLARIZATIONS AND A RETRO-DIRECTIVE ARRAY - The disclosed embodiments relate to a retro-directive array that facilitates a tracking operation. This retro-directive array includes a first antenna configured to receive an input signal which is substantially circularly polarized from a tracking device. The first antenna separates the input signal into two signal components (e.g., E | 05-15-2014 |
20140141731 | ANTENNA ARRANGEMENT FOR 3G/4G SVLTE AND MIMO TO ENABLE THIN NARROW BOARDERED DISPLAY PHONES - A method and system provides a multiple input multiple output (MIMO) antenna arrangement in a wireless communication device. A first antenna element and a second antenna element co-located within a same antenna volume are respectively coupled to first and second antenna feeds proximate to a base perimeter segment of a device chassis. The first antenna feed is at a pre-calculated distance from the second antenna feed. The second antenna element, a first MIMO antenna, is coupled to an antenna ground positioned proximate to the first antenna feed and at a pre-determined distance from the second antenna feed. A third antenna element operating as a second MIMO antenna is placed proximate to a top perimeter segment of the device chassis. The antenna arrangement achieves (a) low correlation between the MIMO antennas and (b) an acceptable or pre-determined level of antenna isolation between the first antenna element and the second antenna element. | 05-22-2014 |
20140141732 | Wireless Transceivers with Filter Arrangement for WiFi and LTE Coexistence - Embodiments provide WiFi and LTE tailored transceiver radio frequency (RF) filtering techniques and configurations to enable coexistence between WiFi and LTE transceivers operating in close proximity. In particular, embodiments provide filtering techniques to reject emissions from LTE into WiFi, and vice versa. The filtering techniques eliminate the need for additional isolation between LTE and WiFi antennas (approximately 50 dB), which is beyond what is achievable in practice. Embodiments can be tailored according to different use cases of the WiFi and LTE transceivers (e.g., fixed CPE, portable router, smart phone with tethering). | 05-22-2014 |
20140162574 | Mobile Communication - An apparatus for use in a mobile device includes a switch unit configured to switch a common connection of a transmitter and a first receiver from a first antenna to a second antenna and a connection of a respective second receiver from the second antenna to the first antenna; and a processing system configured to detect a switch condition that the transmitter needs to transmit via the second antenna, obtain power-related reception parameters of said first and said second receivers, cause the switch unit to switch the common connection of the transmitter and the first receiver so that the transmitter transmits via the second antenna, and adjust the power of the transmitter in dependence on the power-related reception parameters. | 06-12-2014 |
20140170994 | PROVISION OF LINEARITY ENHANCEMENT FOR RF COMMUNICATION DEVICES - A switch is provided, the switch including one or more banks of transistors fabricated on a substrate, wherein body terminals of the transistors in each bank are configured to be individually controlled to have respective body voltages. The values of the body voltages are determined to provide optimum linearity of power transfer by changing properties of the substrate with respect to the properties of the substrate when the body voltages are commonly biased at a value. | 06-19-2014 |
20140206299 | HIGH-FREQUENCY MODULE - A high-frequency module includes a first switch element and a second switch element that are mounted on a multilayer body. The first switch element includes a common terminal and individual terminals. The second switch element includes a common terminal and individual terminals. The individual terminals are connected to any of SAW filters mounted on the multilayer body or low loss filters provided inside the multilayer body. The individual terminals are grounded by being connected to an inner layer ground electrode inside the multilayer body by conductive via holes. | 07-24-2014 |
20140206300 | METHODS AND SYSTEMS FOR NOISE AND INTERFERENCE CANCELLATION - Signals propagating from an aggressor communication channel can cause detrimental interference in a victim communication channel. One or more noise cancellers can generate an interference compensation signal to suppress or cancel the interference based on one or more settings. A controller can execute algorithms to find preferred settings for the noise canceller(s). The controller can use a feedback signal (e.g., receive signal quality indicator) received from a victim receiver during the execution of the algorithm(s) to find the preferred settings. One exemplary algorithm includes sequentially evaluating the feedback resulting from a predetermined list of settings. Another algorithm includes determining whether to move from one setting to the next based on the feedback values for both settings. Yet another algorithm includes evaluating a number of sample settings to determine which of the sample settings result in a better feedback value and searching around that sample setting for a preferred setting. | 07-24-2014 |
20140220908 | ADAPTIVE TRANSMITTER LEAKAGE CANCELATION IN A TRANSCEIVER - An apparatus and method cancel transmitter leakage. The method includes generating a leakage cancelation signal by processing a downconverted signal for cancelation of a leakage signal caused by a transmitter and upconverting the downconverted signal to a radio frequency of the transmitter. The method also includes canceling at least some of the leakage signal in a received signal using the leakage cancelation signal. | 08-07-2014 |
20140220909 | HIGH FREUENCY SEMICONDUCTOR SWITCH AND WIRELESS DEVICE - A high frequency semiconductor switch has a first terminal, second terminals, a first through FET group, second through FET groups and a shunt FET group. The first through FET group has first field effect transistors connected serially with each other. One end of the first through FET group is connected to the first terminal. Each of the second through FET groups has second field effect transistors connected serially with each other. One end of each of the second through FET groups is connected to each of the second terminals. The other end of each of the second through FET groups is commonly connected to the other end of the first through FET group. The shunt FET group has third field effect transistors connected serially with each other between the second terminal and a ground terminal. | 08-07-2014 |
20140220910 | GAIN SYNCHRONIZATION CIRCUITRY FOR SYNCHRONIZING A GAIN RESPONSE BETWEEN OUTPUT STAGES IN A MULTI-STAGE RF POWER AMPLIFIER - A multi-stage radio frequency (RF) power amplifier includes a high-power amplifier path and a low-power amplifier path. The low-power amplifier path includes gain synchronization circuitry in order to synchronize the gain response of the high-power amplifier path and the low-power amplifier path. By synchronizing the gain response of the high-power amplifier path and the low-power amplifier path, the gain linearity of the multi-stage RF amplifier is improved. | 08-07-2014 |
20140220911 | DEDICATED SHUNT SWITCH WITH IMPROVED GROUND - Antenna tuning switch circuitry includes an input port, a shunt switch, control circuitry, and an integrated ground. The shunt switch is coupled between the input port and the integrated ground. The control circuitry includes a control signal input port, a switch driver output port coupled to the shunt switch, and a ground connection port coupled to the integrated ground. The shunt switches, the RF input ports, the control circuitry, and the integrated ground are monolithically integrated on a single semiconductor die. The antenna tuning switch circuitry is adapted to selectively couple the input port to the integrated ground in order to alter one or more operating parameters of an attached antenna. By monolithically integrating the shunt switch together with the control circuitry and the integrated ground, the ON state impedance and the parasitic OFF state impedance of the antenna tuning switch circuitry can be significantly improved. | 08-07-2014 |
20140242923 | SHARED FILTER FOR TRANSMIT AND RECEIVE PATHS - Shared filters used for both transmit and receive paths are disclosed. In an exemplary design, an apparatus (e.g., a wireless device, an integrated circuit, or a circuit module) may include a filter and a switch. The filter operates as a transmit (TX) filter for a first band and as a receive (RX) filter for a second band. The filter may (i) receive and filter an output radio frequency (RF) signal when operating as the TX filter and (ii) receive and filter a received RF signal when operating as the RX filter. The switch is coupled to the filter and receives and passes the output RF signal to the filter or an input RF signal from the filter. The apparatus may further include a second filter operable as a TX filter for multiple bands and/or a third filter operable as an RX filter for multiple bands. | 08-28-2014 |
20140256271 | Reducing Insertion Loss in LNA Bypass Mode by Using a Single-Pole-Triple-Throw Switch in a RF Front End Module - A microwave radio frequency (RF) front end module (FEM) having a low noise amplifier (LNA) with a bypass mode uses a single-pole-triple-throw RF switch that reduces insertion loss to about 1 dB and thereby improves RF receiver sensitivity over existing technology two series connected single-pole-double throw RF switches. The single-pole-triple-throw RF switch may be three metal oxide semiconductor field effect transistor (MOSFET) RF switches that may be arranged with a common source input and isolated independent drain outputs. The RF switches may be single, double or triple gate MOSFET RF switches. The MOSFET RF switches may also be configured as complementary metal oxide semiconductor (CMOS) field effect transistor (FET) RF switches. | 09-11-2014 |
20140256272 | OPTIMIZING ISOLATION AND INSERTION LOSS OF A RADIO FREQUENCY SINGLE-POLE-DOUBLE-THROW SWITCH - A single pole double throw (SPDT) switch is fabricated on an integrated circuit (IC) and may comprise two radio frequency (RF) switching devices each having a separate DC blocking capacitor coupled between respective RF switching devices and a common node. A DC connection is provided between the two RF switching devices with a thin electrically conductive line. This thin electrically conductive line provides for increased isolation between the two RF switching devices and decreased insertion loss. The increased isolation and/or decreased insertion loss is accomplished by tuning the thin electrically conductive line through the characteristic impedance of the line when impedance matching conditions are met. Undesired circuit resonance(s) in the SPDT switch may be substantially reduced by using two or more thin electrically conductive lines that further reduce the thin electrically line(s) inductance. | 09-11-2014 |
20140256273 | TUNABLE QUALITY FACTOR - The present disclosure relates to a wireless communication system configured to transforming the radiating mechanism of the antenna system in such a way to support different operating modes depending on the needs. In some examples, the wireless communication system comprises an antenna structure connected to a signal process unit. The antenna structure comprises a radiating mechanism configured to transmit or receive electromagnetic radiation. A switchable operating mode element is configured to receive a signal and to dynamically vary a quality factor of the radiating element by selectively routing the signal along one of a plurality of signal paths, which respectively provide different antenna parameters to the radiating mechanism, based upon a current operating mode of the wireless communication system. By dynamically varying a quality factor of the radiating element, the wireless communication system can effectively support different operating modes. | 09-11-2014 |
20140256274 | RX-TX Switch with Two Power Amplifiers - There is described a RF front end circuit comprising: a common impedance matching network ( | 09-11-2014 |
20140273888 | IMPLICIT SWITCH FOR SWITCHING BETWEEN RECEIVE AND TRANSMIT MODES OF ANTENNAS - A millimeter-wave radio frequency front-end circuit is provided. The front-end circuit comprises a millimeter-wave antenna configured to receive and transmit millimeter-wave signals; a matching network including at least a first inductor and a second inductor connected in parallel, wherein the matching network ensures impedance matching with the antenna when transmitting and receiving the millimeter wave signals; a power amplifier coupled to the antenna through the matching network; a low noise amplifier coupled to the antenna through the matching network, wherein the power amplifier is on and the low noise amplifier is off when transmitting the millimeter-wave signals, and the power amplifier is off and the low noise amplifier is on when receiving the millimeter-wave signals. | 09-18-2014 |
20140287699 | RF FRONT-END MODULE - An RF front-end module includes a transmitting/receiving terminal, a control unit, a first transmitting block and a second transmitting block. The first transmitting block and the second transmitting block connect the transmitting/receiving terminal and the control unit. The control unit controls on or off status of the first transmitting block and the second transmitting block. Thus, the first transmitting block and the second transmitting block can send a signal to the transmitting/receiving terminal directly without pass through any switch unit, avoiding extra signal loss on switch unit. | 09-25-2014 |
20140295778 | METHOD AND STORAGE MEDIUM FOR ADJUSTING WORKING FREQUENCY OF ELECTRONIC DEVICE, AND ELECTRONIC DEVICE - A method for adjusting a working frequency of an electronic device includes the following. First, determining a current working frequency of the electronic device, a minimum average frequency among the average frequencies of different channels, and a frequency range of one channel used for transmitting/receiving wireless signals. Second, calculating an interference frequency generated by the electronic device, and selecting another antenna to transmit/receive wireless signals when the interference frequency falls within the frequency range of the determined channel. Third, calculating a first time interval between transmitting and receiving wireless signals before switching to the other antenna, and a second time interval between transmitting and receiving wireless signals after switching to the other antenna. Fourth, determining a difference between the first and second time intervals. Fifth, adjusting the current working frequency to decrease the influence on the transmission/receipt of wireless signals when the calculated difference is greater than a predetermined threshold. | 10-02-2014 |
20140295779 | NONRECIPROCAL CIRCUIT ELEMENT AND TRANSCEIVER DEVICE - A nonreciprocal circuit element is configured so that a first center electrode and a second center electrode are arranged on a ferrite, to which a direct current magnetic field generated by a permanent magnet is applied, so as to cross each other and be insulated from each other. One end portion of the first center electrode is connected to a first unbalanced input/output port and one port of a plurality of balanced input/output ports and the other end portion of the first center electrode is connected to ground. One end portion of the second center electrode is connected to a second unbalanced input/output port and the other port of the balanced input/output ports and the other end of the second center electrode is connected to the ground. The one end portion of the first center electrode is connected to the ground via a first capacitor element, and the one end portion of the second center electrode is connected to the ground via a second capacitor element. | 10-02-2014 |
20140302802 | ROUTING AND SHIELDING OF SIGNAL LINES TO IMPROVE ISOLATION - Techniques for routing and shielding signal lines to improve isolation between the signal lines are disclosed. In an exemplary design, an apparatus includes first, second, and third signal lines and a switch. The first, second, and third signal lines are configurable to carry first, second, and third signals, respectively. The switch is coupled between the second signal line and AC ground and is closed when the second signal line is not carrying the second signal. The second signal line isolates the first and third signal lines when the switch is closed. Adjacent signal lines are not active at the same time. A signal line may include positive and negative signal lines, which may have at least one cross over in order to cancel coupling between the positive and negative signal lines. | 10-09-2014 |
20140302803 | COMBINED INTELLIGENT RECEIVE DIVERSITY (IRD) AND MOBILE TRANSMIT DIVERSITY (MTD) WITH INDEPENDENT ANTENNA SWITCHING FOR UPLINK AND DOWNLINK - Methods and apparatus are provided for allowing a transmitter (Tx) to perform antenna selection independently of a receiver (Rx) in a transceiver supporting both transmit diversity and receive diversity. Certain aspects may utilize a cross switch, which may be used in a parallel or cross configuration, to provide for the independent antenna selection, such that the Rx may maintain the ability to operate on the same antenna as the Tx, on another antenna, or on both antennas for enhanced receive diversity. Furthermore, certain aspects may employ additional switching in the baseband domain in an effort to avoid, or at least reduce, switching glitches in the Rx caused by changing the cross switch configuration. In this manner, the Rx need not re-converge upon antenna switching. | 10-09-2014 |
20140315501 | SYSTEMS, TRANSCEIVERS, RECEIVERS, AND METHODS INCLUDING CANCELLATION CIRCUITS HAVING MULTIPORT TRANSFORMERS - Example apparatuses and methods for cancellation of transmitter self interference leakage in a transceiver are described. An example transceiver includes a multiport transformer that may be used as a part of the impedance matching network on the receiver side of the transceiver. One primary port of the multiport transformer may form a portion of a cancellation circuit that, along with other components in a cancellation path, provide amplitude and/or phase modulation to a cancellation signal. The cancellation circuit may tunable and may include only reactive components in some examples. | 10-23-2014 |
20140335799 | BROADBAND DISTRIBUTED ANTENNA SYSTEM WITH NON-DUPLEXER ISOLATOR SUB-SYSTEM - Certain aspects and aspects of the present invention are directed to a distributed antenna system having a downlink communication path, an uplink communication path, and a non-duplexer isolator sub-system. The downlink communication path can communicatively couple a transmit antenna to a base station. The uplink communication path can communicatively couple a receive antenna to the base station. In one aspect, the non-duplexer isolator sub-system can be electronically configured for isolating uplink signals traversing the uplink communication path from downlink signals. In another aspect, a non-duplexer isolator sub-system can be configurable in one or more mechanical steps selecting a frequency response. In another aspect, a non-duplexer isolator sub-system can include an active mitigation sub-system. | 11-13-2014 |
20140342678 | TUNABLE FILTER FRONT END ARCHITECTURE FOR NON-CONTIGUOUS CARRIER AGGREGATION - Front end circuitry for a mobile terminal includes separate receive paths and filtering elements for different portions of each operating band. Accordingly, the filtering elements for each receive path can be designed with a smaller pass-band, thereby reducing the complexity of filtering circuitry in the front end circuitry and improving the efficiency thereof. | 11-20-2014 |
20140349595 | Same-Aperture Any-Frequency Simultaneous Transmit and Receive Communication System - A simultaneous transmit and receive (STAR) system includes a first bidirectional signal port coupled to an antenna, a second port coupled to a transmit signal path, and a third port coupled to receive signal path. A first switch is electrically connected between the first port and the second port, where a transmit signal propagating in the transmit signal path passes through the first switch when closed and then through the first bidirectional signal port to the antenna where the transmit signal is radiated by the antenna. A second switch is connected between the first port and the third port, where a receive signal is received by the antenna and passes through the bidirectional signal port and then through the second switch when closed to the receive signal path. A controller is electrically connected to a control input of each of the first and second switches. | 11-27-2014 |
20140349596 | HIGH-FREQUENCY CIRCUIT MODULE - Provided is a high-frequency module that can prevent a transmission signal from reaching a reception circuit and that can achieve high mounting density. A first duplexer for a first frequency band is mounted on a circuit substrate, and a second transmission filter and a second reception filter that constitute a second duplexer for a second frequency band are embedded in the circuit substrate. The second transmission filter and the second reception filter are embedded in the circuit substrate in locations that overlap at least a part of a projection region that is formed by projecting the first duplexer in a thickness direction of the circuit substrate. The first frequency band and the second frequency band are separated from each other by at least a prescribed frequency range. | 11-27-2014 |
20140357201 | Wireless Communication Device and Wireless Communication Method - A wireless communication device has a first wireless communication unit and a second wireless communication unit. A controller of the wireless communication device is configured to set a communication mode of the first wireless communication unit to a normal mode and a high-quality mode. A communication condition using the first wireless communication unit is detected, and whether the particular value is in a particular range indicating certain communication condition or not is determined. When a particular value is in not the particular range, and when the second wireless communication unit is currently in communication with the second external device, the communication mode of the first wireless communication unit is switched to a high-quality mode. | 12-04-2014 |
20140364071 | COMMUNICATION DEVICE - A communication device includes: a reception antenna; a wireless communication element that synchronizes with a reception signal in an electric wave input from the reception antenna, and receives the reception signal; and a wire communication element connected to the wireless communication element and connected to an external communication device via a communication cable so that the wire communication element transmits a signal to the communication cable. The wire communication element determines whether the wireless communication element synchronizes with the reception signal. When the wire communication element determines that the wireless communication element synchronizes with the reception signal, the wire communication element restricts transmitting the signal to the communication cable. | 12-11-2014 |
20140370826 | WIRELESS SENSOR BASE STATION WITH COEXISTENCE OF MULTIPLE HOMOGENEOUS RADIOS - Techniques are disclosed for reducing interference, in a network device, among multiple radio circuits operating in a same or similar frequency band and in close physical proximity. In some embodiments, a network device includes a first and a second wireless network circuit. The network circuits operate in a same radio frequency band and are collocated. The second network circuit is assigned a higher priority than the first network circuit. The device further includes a coexistence controller coupled to the network circuits via a communication bus and configured to selectively suppress transmitting operations of the first network circuit during receiving operations of the second network circuit. Among other benefits, the embodiments can increase wireless network bandwidth and reduce mobile device power consumption by providing coordination among the radio circuits so that the transmitting and receiving operations are performed in a way that they do not interfere with their respective antennas. | 12-18-2014 |
20140370827 | HIGH FREQUENCY MODULE - Provided is a high frequency module capable of reducing the IMD. During the transmission/reception operation based on W-CDMA, control signals VSWCC, VTRXCC are output as Hi signals from a control logic. Consequently, transistor T | 12-18-2014 |
20150031315 | RF DEVICE AND METHOD WITH IMPROVED ACTIVE LOAD MODULATION CAPABILITY - There is described an RF bidirectional communication device utilizing active load modulation, the device comprising (a) a resonance circuit including an antenna ( | 01-29-2015 |
20150056933 | TX ANTENNA SELECTION FOR LTE IN MULTIPLE RADIO DEVICES - Device antennas may be allocated such that a non-LTE module (e.g., GSM module or 1x module) shares the same antenna with an LTE DRx module. This may lead to degradation of a non-LTE voice service when the LTE DRx module performs LTE transmit antenna selection causing the non-LTE module to be switched to a different antenna during reception/transmission of voice slots, resulting in a loss of slots. Accordingly, a method, an apparatus, and a computer program product for controlling antenna switching are provided. The apparatus facilitates a first radio module to use a first antenna for performing a first operation, detects that a second radio module will attempt to use the first antenna during transmit antenna selection for performing a second operation, and determines whether to switch use of the first antenna from the first radio module to the second radio module based on a type of the first operation. | 02-26-2015 |
20150065064 | ACTIVE INTERFERENCE CANCELLATION IN ANALOG DOMAIN - A method of performing interference cancellation (IC) in a communication device having a plurality of transmitters and a plurality of receivers includes detecting a co-existence issue between a first transmitter and a first receiver; selecting the first transmitter for providing an input signal to IC circuit; selecting the first receiver, wherein each of the receivers has a corresponding filter, the first receiver having a filter for filtering a signal received by the first receiver to provide a first filtered signal; configuring the IC circuit based on parameters of the co-existence issue; generating an output signal based on the input signal and the parameters; selecting a filter, based on the filter of the first receiver, the selected filter configured to filter the output signal to provide a second filtered signal; and generating a cancellation signal based on the first and second filtered signals. | 03-05-2015 |
20150065065 | RF TRANSCEIVER WITH ISOLATION TRANSFORMER AND METHODS FOR USE THEREWITH - A radio frequency (RF) transceiver includes an RF transmitter that generates a transmit signal based on outbound data for transmission to a remote communication device in a frequency band. An RF receiver generates inbound data based on a received signal from the remote communication device in the frequency band. An antenna section includes a shared antenna configurable for full-duplex transceiving of the transmit signal and the received signal and a center-tap isolation transformer configurable to isolate the transmit signal from the received signal. | 03-05-2015 |
20150065066 | APPARATUS AND METHOD FOR SETTING ANTENNA RESONANT MODE OF MULTI-PORT ANTENNA STRUCTURE - An antenna tuning circuit for setting an antenna resonant mode of an antenna structure includes a switch arranged to selectively couple a first interconnection node to a second interconnection node, wherein the first interconnection node is coupled to a first port of the antenna structure, and the second interconnection node is coupled to a second port of the antenna structure. An antenna tuning method for setting an antenna resonant mode of an antenna structure includes generating a first control signal and selectively coupling a first interconnection node to a second interconnection node in response to the first control signal, wherein the first interconnection node is coupled to a first port of the antenna structure, and the second interconnection node is coupled to a second port of the antenna structure. | 03-05-2015 |
20150072629 | WIRELESS COMMUNICATION DEVICE FRONT END AND DISTRIBUTED ANTENNA SYSTEM - A wireless communication device front end includes power amplifiers, low noise amplifiers, and a distributed antenna system. The distributed antenna system includes antennas and an antenna coupling circuit. The antenna coupling circuit receives an outbound signal of a first wireless communication from a power amplifier and sends first and second components of the outbound signal to first and second antennas. The antenna coupling circuit also receives an inbound signal of a second wireless communication from a third antenna and sends the inbound signal to a low noise amplifier. The third antenna is a distance from the first antenna and from the second antenna such that, in air, the outbound signal is attenuated at the third antenna. | 03-12-2015 |
20150087247 | SEMICONDUCTOR DEVICE AND WIRELESS COMMUNICATION DEVICE - To realize an optimal power-on reset in a system in which the rise of the power supply voltage is sharp. | 03-26-2015 |
20150105033 | APPARATUS AND METHODS FOR PHASE COMPENSATION IN POWER AMPLIFIERS - Apparatus and methods for phase compensation in power amplifiers are disclosed herein. In certain implementations, a power amplifier includes an input stage, an output stage, an envelope tracker, and a compensation circuit. The input and output stages are cascaded and amplify an input RF signal to generate an amplified output RF signal. The envelope tracker generates a power amplifier supply voltage for at least the output stage based on an envelope of the input RF signal. The compensation circuit compensates for changes in input impedance of the output stage associated with changes in the voltage level of the power amplifier supply voltage. By including the compensation circuit, a variation in the power amplifier's phase delay versus input power can be reduced, thereby leading to an improvement in the power amplifier's phase distortion (AM/PM). | 04-16-2015 |
20150118976 | RADIO FREQUENCY SWITCHING CIRCUIT WITH ADVANCED ISOLATION CHARACTERISTICS - A radio frequency switching circuit may include a first switching circuit unit including first to n | 04-30-2015 |
20150126137 | System and Method for Communicating with an Unpowered Device - An apparatus for performing operations using low power, including control circuitry; a radio frequency (RF) circuit for receiving RF signals at one or more frequencies; an internal power source; and switching circuitry coupled between the control circuitry and the internal power source, the switching circuitry having a control terminal coupled to an output of the RF circuit. The apparatus is configured in a normal mode of operation and an off mode of operation in which the apparatus is powered down, and wherein in the off mode of operation energy from the received RF signals control a state of the switching circuitry to selectively couple the internal power source with the control circuitry for performing one or more operations. | 05-07-2015 |
20150126138 | System and Method for Communicating with an Unpowered Device - An apparatus for shipping a device containing a circuit, including a bag sized for holding the device; and an antenna connected to the bag, the antenna having a first end for coupling to the circuit of the device when the device is in the bag so as to allow for radio frequency (RF) communication with the device while the device is in the bag. Separation of the device from the bag causes the antenna to be disconnected from the circuit of the device. | 05-07-2015 |
20150126139 | VIA PLACEMENT IN RADIO FREQUENCY SHIELDING APPLICATIONS - Aspects of the present disclosure relate to determining the location and/or density of vias that form part of an RF isolation structure of a packaged module and the resulting RF isolation structures. From electromagnetic interference (EMI) data, locations of where via density can be increased and/or decreased without significantly degrading the EMI performance of the RF isolation structure can be identified. In certain embodiments, one or more vias can be added and/or removed from a selected area of the packaged module based on the EMI data. | 05-07-2015 |
20150133066 | Method for Intelligently Switching On/Off Mobile Terminal Antenna and Corresponding Mobile Terminal - A method for intelligently switching on/off an antenna of a mobile terminal and a corresponding mobile terminal are provided. A method includes: detecting a current working frequency band and a surrounding environment of a terminal; and according to a preset correspondence among an antenna radiation unit, an environmental condition, and the current working frequency band, changing impedance characteristics of a parasitic unit radiator. Another method includes: detecting a current working frequency band of a terminal; and according to a preset correspondence between an antenna radiation unit and the current working frequency band, changing impedance characteristics of a parasitic unit radiator. Another method includes: detecting a current surrounding environment of a terminal; and according to a preset correspondence between an antenna radiation unit and an environmental condition, changing impedance characteristics of a parasitic unit radiator. The terminal includes: a detection unit, an antenna control unit, and an antenna radiation unit. | 05-14-2015 |
20150133067 | SYSTEMS AND METHODS RELATED TO CARRIER AGGREGATION FRONT-END MODULE APPLICATIONS - Improved switched multiplexer architecture for supporting carrier aggregation in front-end applications. In some embodiments, an N-plexing system can include an assembly of filters configured to provide N filtered paths, and a switching circuit in communication with the assembly of filters. The switching circuit can be configured to provide a plurality of switchable paths between the assembly of filters and an antenna port to allow simultaneous operation between the N filtered paths and the antenna port. In some embodiments, N can be 4 for a quadruplexing system or 2 for a duplexing system, and such a system can be implemented in a front-end module (FEM) for wireless devices. | 05-14-2015 |
20150140937 | ON-CHIP TRANSMIT AND RECEIVE FILTERING - An integrated circuit chip including a chip pin configured to direct radio frequency signals on and off chip; a signal path from the chip pin which divides into a first signal path coupled to an input unit and a second signal path coupled to an output unit; a first filter between the chip pin and the input unit on the first signal path; a second filter between the chip pin and the output unit on the second signal path; a first switch coupling the first signal path to ground; and a second switch coupling the second signal path to ground; wherein the first and second switches are controllable to isolate the input unit from the output unit when the integrated circuit chip is transmitting a radio frequency signal, and to isolate the output unit from the input unit when the integrated circuit chip is receiving a radio frequency signal. | 05-21-2015 |
20150140938 | Method for Selecting State of a Reconfigurable Antenna in a Communication System Via Machine Learning - A method for selecting the state of a reconfigurable antenna installed at either the receiver or transmitter of a communication system is provided. The proposed method uses online learning algorithm based on the theory of multi-armed bandit to perform antenna state selection. The selection technique utilizes the Post-Processing Signal-to-Noise Ratio (PPSNR) as a reward metric and maximizes the long-term average reward over time. The performance of the learning based selection technique is empirically evaluated using wireless channel data. The data is collected in an indoor environment using a 2×2 MIMO OFDM system employing highly directional metamaterial Reconfigurable Leaky Wave Antennas. The learning based selection technique shows performance improvements in terms of average PPSNR and regret over conventional heuristic policies. | 05-21-2015 |
20150295559 | MULTIPLEXER USING MULTIPLE TUNED OUTPUT IMPEDANCES FOR REDUCED HARMONIC GENERATION - A multiplexer comprises a plurality of filters connected to a common node and each comprising a plurality of acoustic resonators, and a plurality of harmonic traps each integrated into a corresponding one of the plurality of filters and configured to suppress harmonic generation of another one of the filters. | 10-15-2015 |
20150295595 | SWITCH MODULE - Impedance mismatching by a matching circuit provided on a signal line which connects a first common terminal and a second common terminal is eliminated so as to significantly reduce insertion loss of a switch module. Therefore, it is possible to provide a switch module which has a simple configuration without the need for connection of a matching circuit to antenna terminals to which antennas are respectively connected, and is able to selectively connect any one of the antennas and any one of communication systems. | 10-15-2015 |
20150295600 | MOBILE WIRELESS COMMUNICATIONS DEVICE PROVIDING ENHANCED INTERFERENCE MITIGATION FROM WIRELINE TRANSMITTER AND RELATED METHODS - A mobile wireless communications device may include a housing, a wireless receiver carried by the housing and configured to receive communication signals over a wireless frequency range, a wireline transmitter carried by the housing and configured to transmit communication signals at a frequency overlapping the wireless frequency range, and a controller carried by the housing and coupled with the wireless receiver and the wireline transmitter. The controller may be configured to determine when the wireless receiver is to begin receiving and, based thereon, switch the wireline transmitter to a suspended communication mode during which transmission is disabled. The controller may also be configured to determine when the wireless receiver has completed receiving and, based thereon, switch the wireline transmitter to a normal communication mode in which transmission is enabled. | 10-15-2015 |
20150303563 | Split Ring Resonator Antenna Adapted for Use in Wirelessly Controlled Medical Device - An infusion pump assembly is disclosed. The infusion pump assembly includes a reservoir for receiving an infusible fluid, a pump assembly for pumping a quantity of infusible fluid from the reservoir to an exit, a first valve assembly configured to selectively isolate the pump assembly from the reservoir, a second valve assembly configured to selectively isolate the exit from the pumping assembly, and a split ring resonator antenna having a resonant frequency comprising a plurality of planar metallic layers. | 10-22-2015 |
20150303976 | RF FRONT-END CIRCUITRY WITH TRANSISTOR AND MICROELECTROMECHANICAL MULTIPLE THROW SWITCHES - This disclosure relates generally to radio frequency (RF) front-end circuitry for routing RF signals to and/or from one or more antennas. Exemplary RF front-end circuitry includes a multiple throw solid-state transistor switch (MTSTS) and a multiple throw microelectromechanical switch (MTMEMS). The MTSTS may be configured to selectively couple a first pole port to any one of a first set of throw ports. The MTMEMS is configured to selectively couple a second pole port to any one of a second set of throw ports. The second pole port of the MTMEMS is coupled to a first throw port in the first set of throw ports of the MTSTS. The MTSTS helps prevent hot switching in the MTMEMS since the first throw port of the MTSTS may be decoupled from the second pole port of the MTMEMS before decoupling the second pole port from a selectively coupled throw port of the MTMEMS. | 10-22-2015 |
20150303977 | DEVICES AND METHODS RELATED TO HIGH POWER DIODE SWITCHES - Devices and methods related to high power diode switches. In some embodiments, a radio-frequency (RF) switch circuit can include a plurality of first switchable paths implemented between a pole and a first throw, with each first switchable path including one or more PIN diodes. The RF switch circuit can further include a second switchable path implemented between the pole and a second throw, with the second switchable path including one or more PIN diodes. The pole can be an antenna port, and the first and second throws can be transmit (TX) and receive (RX) ports, respectively. | 10-22-2015 |
20150303978 | RADIO FREQUENCY SWITCHING MODULE AND CONTROL METHOD THEREOF - A radio frequency (RF) switching module and a control method of the RF switching module are described. The RF switching module has 2 switches, and the control method includes starting to turn off a first switch of the RF switching module, starting to turn on a second switch of the RF switching module after the first switch is turned off for a first predetermined time, wherein starting to turn off the first switch and starting to turn on the second switch is finished during a transition period from a first mode to a second mode. | 10-22-2015 |
20150303979 | ELECTRONIC DEVICE HAVING SENSOR-COMBINED ANTENNA DEVICE - An electronic device including an antenna device with an integrated sensor is provided. In an embodiment, first and second antenna radiators are operably connected. A communication module transmits or receive communication signals through the first and/or second antenna radiator. A separation circuit such as a series connected inductor is connected in a path between the first and second antenna radiators. The separation circuit prevents passage of the communication signals through the path while enabling passage of a sensing signal acquired through the first and second antenna radiators. A sensor module such as a proximity sensor receives the sensing signal acquired through the first and second antenna radiators. A processor controls a function of the electronic device based on the sensing signal. | 10-22-2015 |
20150303984 | TRANSMIT LEAKAGE CANCELLATION IN A WIDE BANDWIDTH DISTRIBUTED ANTENNA SYSTEM - A system and methods for cancelling transmission leakage signals in a wide bandwidth Distributed Antenna System (“DAS”) having remote units is disclosed. An internal cancellation circuit within the remote unit is employed to reduce the transmitted leakage signals by generating a cancellation signal. This cancellation signal is added to the received signal to cancel the transmission leakage signal in the receiving signal path. A pilot signal generation circuit is employed to optimize the cancellation circuit operating parameters. The frequency of the pilot signal is swept over a range to determine the pilot frequency having the highest electromagnetic coupling. The amplitude and phase of the cancellation signal is then optimized to minimize the level of transmission leakage in the receiving transmission path. | 10-22-2015 |
20150304000 | APPARATUS AND METHODS FOR MULTI-BAND RADIO FREQUENCY SIGNAL ROUTING - Apparatus and methods for multi-band RF signal routing are provided herein. In certain configurations, a mobile device includes an antenna switch module, a diversity module, and one or more diversity antennas. The diversity module is electrically coupled to the one or more diversity antennas, and processes diversity signals received on the one or more diversity antennas to generate a high band (HB) signal, a mid band (MB) signal, and a low band (LB) signal. Additionally, the diversity module generates a combined LB/HB signal based on combining the LB signal and the HB signal, and provides the MB signal and the combined LB/HB signal to the antenna switch module. | 10-22-2015 |
20150304963 | Method To Improve Throughput in Multi-SIM-Multi-Active Scenario Using Adaptive Transmit Blanking of Data and Control Channels - Various embodiments provide methods implemented on a multi-SIM-multi-active (MSMA) communication device for managing a victim subscription's de-sense by reducing transmit power of an aggressor subscription's data channel(s) before reducing transmit power of the control channel. When the victim is being/will be de-sensed, a processor of the MSMA communication device may determine a de-sense power threshold at which an aggressor subscription may transmit without de-sensing one or more victim subscriptions. The processor may reduce the transmit power of the aggressor subscription's data channel(s) to within the de-sense power threshold. If zeroing the aggressor subscription's data channel(s) transmit power is insufficient to avoid de-sense of the victim, the transmit power of the aggressor subscription's control channel may be reduced until the total transmit power of the aggressor subscription equals or is less than the de-sense power threshold. This reduces de-sense to the victim subscription with minimum impairment to the aggressor subscription's throughput. | 10-22-2015 |
20150311864 | SWITCHING SYSTEM WITH LINEARIZING CIRCUIT - A transistor-based switch is coupled to a replica circuit that includes transistor circuitry similar to that of the switch. The replica circuit biases a switched transistor to promote linear operation of the switch. | 10-29-2015 |
20150311929 | INTERFERENCE CANCELLATION USING INTERFERENCE MAGNITUDE AND PHASE COMPONENTS - A communication device can independently determine an interference magnitude component and an interference phase component for interference cancellation. The interference magnitude component may be estimated based, at least in part, on a magnitude polynomial expansion and a transmit signal of the communication device. The interference phase component may be estimated based, at least in part, on a phase polynomial expansion and the transmit signal. The magnitude polynomial expansion and the phase polynomial expansion may have different polynomial terms. The interference signal may be determined based, at least in part, on the interference magnitude component and the interference phase component. At least a portion of the interference signal may be cancelled from a receive signal received by the communication device. | 10-29-2015 |
20150318889 | BYPASS PATH LOSS REDUCTION - Aspects of this disclosure relate to reducing insertion loss associated with a bypass path. In an embodiment, an apparatus includes a first switch having at least two throws, a second switch having at least two throws, a bypass path between the first switch and the second switch, and at least one inductor. The at least one inductor is configured to compensate for capacitance associated with the bypass path to cause insertion loss of the bypass path to be reduced. | 11-05-2015 |
20150326206 | Mismatch Detection using Replica Circuit - An apparatus for detecting an operating characteristic mismatch at an output of an amplifier by using a replica circuit is presented. In one exemplary case, a detected voltage difference at the output of the two circuits is used to drive a tuning control loop to minimize an impedance mismatch at the output of the amplifier. In another exemplary case, the replica circuit is used to detect a fault in operation in a corresponding main circuit. A method for detecting a load mismatch in a main RF circuit using the replica circuit is also presented. | 11-12-2015 |
20150326268 | RADIO FREQUENCY SWITCH - A radio frequency switch may include: a common port transmitting and receiving a radio frequency signal; a receive switch unit including a first switch unit having a plurality of first switch elements and a second switch unit having a plurality of second switch elements; and a transmit switch unit including a third switch unit having a plurality of third switch elements and a fourth switch unit having a plurality of fourth switch elements. The receive switch unit may further include a plurality of first capacitors connected between a first terminal and a body terminal of each of the plurality of first switch elements. The transmit switch unit may further include a plurality of second capacitors connected between a second terminal and a body terminal of each of the plurality of third switch elements. | 11-12-2015 |
20150333778 | LOW POWER, LOW OUT-OF-BAND HARMONIC CONTENT RADIO - A radio that includes a transceiver to transmit and receive RF signals. The transceiver including a transmitter, a transformer, and a receiver, the transformer is coupled to and shared between the transmitter and the receiver. A resonator is formed by the combination of the transformer and capacitive elements of the transmitter and receiver. | 11-19-2015 |
20150341076 | HIGH-FREQUENCY MODULE AND COMMUNICATION DEVICE - A high-frequency module is connected to a switch port and a switch IC including an antenna connection port and a plurality of switch ports. The high-frequency module includes a signal path that outputs transmitting signals having a predetermined frequency band to the switch IC, a module port connected to the signal path and to which a duplexer and a transmitter circuit are connected, and a harmonic branch circuit that is provided on the signal path and allows a harmonic of the transmitting signal to escape to ground. | 11-26-2015 |
20150349770 | System and Method for a Radio Frequency Switch - In accordance with an embodiment, a circuit includes a plurality of switching networks coupled between a corresponding plurality of RF ports and a common RF port, and a control circuit. Each of the plurality of switching networks includes a first switch coupled between its corresponding RF port and the common RF port, and at least one of the plurality of switching networks includes a selectable network coupled between the first switch and the common RF port, such that the selectable network provides a DC path in a first state and a series capacitance in a second state. | 12-03-2015 |
20150349837 | WIRELESS DEVICES HAVING REDUCED CLOCK FEED-THROUGH - Implementations of radio frequency switch controllers within the scope of the appended claims are configured to reduce the impact of the clock signal induced spurs. In particular, implementations of switch controllers described herein include a poly-phase clocking scheme, as opposed to a single phase to clock the charge pump stages of an negative voltage generator. In some implementations poly-phase clocking schemes reduce the clock signal induced spurs and may preclude the need for additional on-chip or off-chip decoupling capacitors that add to the cost and physical size of a complete front end module solution. | 12-03-2015 |
20150358047 | Intermodulation Cancellation of Third-order Distortion in an FDD Receiver - A transceiver device may include a transmit path that generates a modulated transmit signal based on a baseband signal, and a receive path that receives a receive signal, which is subject to third-order order distortion caused by intermodulation noise resulting from a continuous wave blocker intermodulating with transmit leakage from the transmit path. The transceiver may also include a compensation path that models portions of the transmit path and the receive path, and generates a replica signal representative of the third-order order distortion according to at least a specified function and the modeled portions of the transmit path and the receive path. The compensation path also filters the replica signal and subtracts the filtered replica signal from the receive signal to eliminate the third-order order distortion caused by the intermodulation noise. The filtering of the replica signal may be performed by programmable finite impulse response filters. | 12-10-2015 |
20150365127 | RF MODULE - An RF module includes a first FEM configured to bypass a signal in a first band, and to block a signal in a second band; and a second FEM configured to block a signal in a first band, and to bypass a signal in a second band. | 12-17-2015 |
20150366002 | ANTENNA STRUCTURE, COMMUNICATION APPARATUS AND ELECTRONIC EQUIPMENT - Embodiments of the present application provide an antenna structure, communication apparatus and electronic equipment. The antenna structure includes a first antenna and a second antenna configured to perform first network communication; wherein the antenna structure further includes a third antenna located between the first antenna and the second antenna and configured to perform second network communication, the third antenna being connected to a communication module of the second network. By providing the third antenna configured to perform the second network communication between the first antenna and the second antenna configured to perform the first network communication, the correlation between the first antenna and the second antenna may be reduced, and the second network communication may be performed. | 12-17-2015 |
20150372709 | CONCURRENCY-MODE SCAN SCHEDULING FOR WIRELESS DEVICES - A wireless device operates as both a station and one or more access points. In the wireless device, a scan window of a specified duration is requested to start at a first time, to scan for access points external to the wireless device in accordance with operation of the wireless device as a station. It is determined that a beacon scheduled for transmission or reception at a second time conflicts with the requested scan window. In response, the beacon is transmitted or received at the second time and at least a portion of the scan window is delayed until after the beacon has been transmitted or received. | 12-24-2015 |
20150372710 | REVERSIBLE TDD TRANSCEIVER - A radio transceiver, particularly for use in a time division duplex system, has two reversible transceiver chains, each containing a respective radio frequency mixer; and an intermediate frequency generator, for receiving a baseband signal containing data for transmission, and for generating signals at two different intermediate frequencies modulated with said data. In a receive mode, each transceiver chain receives a respective signal at a respective radio frequency, and the respective radio frequency mixer downconverts the respective signal to a respective intermediate frequency. In transmit mode, one of said signals at the two different intermediate frequencies modulated with said data is passed to the respective radio frequency mixer for upconversion to the respective RF frequency. An AIS transponder includes such a radio transceiver. Miniaturization is helped by reusing certain circuit areas for both transmit and receive. | 12-24-2015 |
20150381112 | FILTER WITH AN AUXILIARY MIXING PATH - An apparatus includes an auxiliary mixing path configured to receive a differential signal. The apparatus also includes a filter having an input coupled to the auxiliary mixing path. | 12-31-2015 |
20150381168 | HIGH FREQUENCY SWITCHING CIRCUIT - A high frequency switching circuit for a first high frequency signal that is input through a first terminal and a second high frequency signal that is input through a second terminal includes a first transmission line connecting a first transistor to the first terminal. The first transmission line has a line length that is an integer multiple of a quarter wavelength of the first high frequency signal. The first transistor is connected between the first terminal and the second terminal and changes conduction state according to a first control signal. A second transmission line connects a second transistor to a third terminal. The second transistor is connected between the second terminal and a third terminal and changes conduction state according to a second control signal. The second transmission line has a line length that is an integer multiple of a quarter wavelength of the second high frequency signal. | 12-31-2015 |
20150381223 | METHOD FOR SUPPRESSING TRANSMISSION NOISE COMPRISED IN RECEIVED DOWNLINK SIGNAL AND COMMUNICATIONS APPARATUS UTILIZING THE SAME - A method suppresses transmission noise comprised in a plurality of downlink signals received by one of a first radio module or a second radio module comprised in a communications apparatus. The method receives a plurality of first signals and a plurality of second signals, wherein the first signals and the second signals are the downlink signals respectively received via different antennas of the one of the first radio module or the second radio module, or the first signals are the downlink signals received by the one of the first radio module or the second radio module and the second signals are a portion of the uplink signals provided by the other one of the first radio module and the second radio module, and processes the plurality of first signals and the plurality of second signals to cancel transmission noise comprised in the plurality of downlink signals. | 12-31-2015 |
20160006476 | WIRELESS COMMUNICATIONS APPARATUS - The invention provides wireless communications apparatus comprising: a wireless communications device comprising: an antenna module; circuitry in communication with the antenna module; a circuit interface within the circuitry or between the circuitry and the antenna module; and impedance matching circuitry configurable to adjust an impedance match at the circuit interface; and a controller in data communication with a memory storing a user profile associated with the wireless communications device, or with a user of the wireless communications device, the user profile comprising configuration data relating to one or more impedance matching configurations of the impedance matching circuitry, the configuration data being associated with one or more parameters of the wireless communications device, wherein the controller is configured to use configuration data from the user profile to configure the impedance matching circuitry responsive to a determination of one or more parameters of the device associated with that configuration data. | 01-07-2016 |
20160013766 | LINEAR FET FEEDBACK AMPLIFIER | 01-14-2016 |
20160020815 | ARCHITECTURES AND METHODS RELATED TO INSERTION LOSS REDUCTION AND IMPROVED ISOLATION IN SWITCH DESIGNS - Architectures and methods related to insertion loss reduction and improved isolation in switch designs. In some embodiments, a switching architecture can include a switch network having one or more switchable radio-frequency (RF) signal paths, where each path contributes to a parasitic effect associated with the switch network. The switching architecture can further include a parasitic compensation circuit coupled to a node of the switch network. The parasitic compensation circuit can be configured to compensate for the parasitic effect of the switch network. | 01-21-2016 |
20160020816 | CIRCUITS AND METHODS RELATED TO ADJUSTABLE COMPENSATION FOR PARASITIC EFFECTS IN RADIO-FREQUENCY SWITCH NETWORKS - Circuits and methods related to adjustable compensation for parasitic effects in radio-frequency switch networks. In some embodiments, an adjustable compensation circuit for a radio-frequency (RF) circuit can include an inductive circuit that couples a selected node of the RF circuit with a reference node. The inductive circuit can be configured to provide a plurality of inductance values. In some embodiments, the RF circuit can be, for example, a switch network having a plurality of switchable RF signal paths, the reference node can be a ground node, and the selected node can be a common node such as an antenna port. | 01-21-2016 |
20160037360 | WIRELESS SENSOR BASE STATION WITH COEXISTENCE OF MULTIPLE HOMOGENEOUS RADIOS - Techniques are disclosed for reducing interference, in a network device, among multiple radio circuits operating in a same or similar frequency band and in close physical proximity. In some embodiments, a network device includes a first and a second wireless network circuit. The network circuits operate in a same radio frequency band and are collocated. The second network circuit is assigned a higher priority than the first network circuit. The device further includes a coexistence controller coupled to the network circuits via a communication bus and configured to selectively suppress transmitting operations of the first network circuit during receiving operations of the second network circuit. Among other benefits, the embodiments can increase wireless network bandwidth and reduce mobile device power consumption by providing coordination among the radio circuits so that the transmitting and receiving operations are performed in a way that they do not interfere with their respective antennas. | 02-04-2016 |
20160043456 | RADIO-FREQUENCY SWITCHES HAVING EXTENDED TERMINATION BANDWIDTH AND RELATED CIRCUITS, MODULES, METHODS, AND SYSTEMS - Circuits and methods related to a switch having extended termination bandwidth are disclosed. A switch having an input end and an output end, and capable of being in an ON state and an OFF state, can include a termination circuit configured to yield an extended frequency bandwidth in which a desired OFF state termination impedance is provided. A termination circuit may include two or more electrically parallel resistor-capacitor branches coupled to the switch input or output end. A switch termination circuit may provide an OFF state termination impedance that is substantially equal to the switch ON state termination impedance. Also, a termination circuit may enable a desired termination impedance without sacrificing other switch performance features, including insertion loss, isolation, or VSWR difference between ON and OFF states. Also disclosed are examples of how the foregoing features can be implemented in different products and methods of fabrication. | 02-11-2016 |
20160043768 | FRONT-END TRANSCEIVERS WITH MULTIPLE RECEPTION CHANNELS - A front-end receiver includes a first mixer of a first channel, a second mixer of a second channel, and a switching circuit that is configured to select the first mixer or the second mixer during a particular time period. Upon being selected, one of the first mixer or the second mixer is configured to deliver a down-converted signal that down-converts a respective RF signal of either the first or second reception channel. As the tasks of down-conversion and multiplexing are combined at the mixer level, the first and second reception channels may share a baseband circuit while being able to provide a well-balanced metrics of channel isolation, low noise figure, and linearity. | 02-11-2016 |
20160056819 | HIGH FREUENCY SEMICONDUCTOR SWITCH AND WIRELESS DEVICE - A high frequency semiconductor switch has a first terminal, second terminals, a first through FET group, second through FET groups and a shunt FET group. The first through FET group has first field effect transistors connected serially with each other. One end of the first through FET group is connected to the first terminal. Each of the second through FET groups has second field effect transistors connected serially with each other. One end of each of the second through FET groups is connected to each of the second terminals. The other end of each of the second through FET groups is commonly connected to the other end of the first through FET group. The shunt FET group has third field effect transistors connected serially with each other between the second terminal and a ground terminal. | 02-25-2016 |
20160072441 | INPUT SWITCH LEAKAGE COMPENSATION - An apparatus including: a first switch configured to provide a feed-forward path at an input of a first amplifier of a plurality of amplifiers coupled together at a single port, the feed-forward path configured to substantially reduce a leakage current into an input of a second amplifier of the plurality of amplifiers. | 03-10-2016 |
20160072544 | DIFFERENTIAL CAPACITIVE ANTENNA PORTS COEXISTENCE IN WIRELESS CAPACITIVE SIGNAL RECEPTION AND TRANSMISSION SYSTEMS AND/OR WIRELESS CAPACITIVE POWER SUPPLY TRANSMISSION SYSTEMS - Disclosed are antenna ports for high-speed, short-range, capacitive wireless devices that can be used for stream data and power supply transmission between two adjacent electronic devices, modules, etc. In various embodiments, differential capacitive antenna ports for the wireless capacitive signal reception and transmission include a capacitive transmission port configured to generate electric fields that represent transmitted signals with at least one pair of transmitting terminals, with conductive working surfaces connected to the port inputs at the input feed points, and a capacitive reception port configured to detect electric fields that represent transmitted signals with at least one pair of receiving terminals, with conductive working surfaces connected to the port outputs at the output feed points. | 03-10-2016 |
20160087658 | NOISE CANCELER FOR USE IN A TRANSCEIVER - A noise canceler for use in a transceiver is disclosed. In an exemplary embodiment, an apparatus includes a split amplifier to output an amplified transmit signal, the split amplifier providing a first noise attenuation factor in a receive band. The apparatus also includes a transmit antenna to transmit the amplified transmit signal, the transmit antenna being isolated from a receive antenna by an antenna isolation factor that provides a second noise attenuation factor in the receive band. The apparatus also includes a noise canceler configured to subtract a detection signal from a received signal to obtain an adjusted received signal, wherein subtraction of the detection signal provides a third noise attenuation factor in the receive band, and wherein the first, second, and third noise attenuation factors combine to provide a selected amount of noise attenuation in the receive band. | 03-24-2016 |
20160094267 | TRANSMIT ENERGY LEAKAGE CONTROL IN A RECEIVER - Systems and methods are provided for removing interference from received signals. An interference control signal may be generated in a transceiver during transmission and reception of signals. The interference control signal may be generated based on a first interference control input corresponding to an input signal used in generating the transmitted signals, and a second interference control input corresponding to a model of a leakage of the transmitted signals onto the received signals. The model may be based on a first approximation of a transfer function for the leakage. The interference control signal may be combined with an intermediate signal generated during processing of the received signals, to generate a corresponding combined signal, and the combined signal may be applied during processing of the received signals. | 03-31-2016 |
20160099743 | APPARATUS AND METHODS FOR BIASING RADIO FREQUENCY SWITCHES - Apparatus and methods for radio frequency (RF) switches are provided herein. In certain implementations, an RF switching circuit includes an adaptive switch bias circuit that controls gate and/or channel voltages of one or more field effect transistor (FET) switches. Additionally, the adaptive switch bias circuit is powered by a power high supply voltage and a power low supply voltage, and can be used to selectively turn on or off the FET switches based on a state of one or more switch enable signals. The adaptive switch bias circuit adaptively biases that gate and/or channel voltages of the FET switches based on a voltage difference between the power high and power low supply voltages to provide switch biasing suitable for use with two or more different power supply voltage levels. | 04-07-2016 |
20160119015 | DEVICES AND METHODS RELATED TO INTERFACES FOR RADIO-FREQUENCY MODULES - Systems, apparatuses and methods are disclosed providing signal conditioning circuits configured to condition RF signals, and an interface in communication with the signal-conditioning circuits, the interface including M inputs and N outputs, each of the quantities M and N greater than 1. The interface is configured so that each of at least two of the M inputs is coupled to a separate output through a separate switch. | 04-28-2016 |
20160127006 | Arbitrator for Multi-Radio Antenna Switching - A user equipment device (UE) may be configured to collect first performance information from antennas of a first plurality of antennas. The first plurality of antennas may be coupled to a first radio of the UE that may be configured to perform wireless communications according to a first RAT. The UE may determine, based on at least the first performance information, a highest performing antenna of the first plurality of antennas to use for communications according to the first RAT. Additionally, the UE may determine, also based on at least the first performance information, a first antenna of a second plurality of antennas to use for communications according to a second RAT. The second plurality of antennas may be coupled to a second radio of the UE that may be configured to perform wireless communications according to the second RAT. | 05-05-2016 |
20160127007 | Wi-Fi Adaptive Transmit Antenna Selection - Wireless communication devices (UEs) may include multiple receive (RX) chains and associated antennas, and at least one transmit (TX) chain co-located with one of the RX chains. The UE may track instant fading of the antenna gain(s) during reception of packets from an associated access point (AP) device to which the UE intends to transmit packets. The UE may also track long term antenna gain(s), using any packets received at the multiple RX chains within the UE. At a switching occasion, a decision is made by the UE whether to switch antennas. If the instant fading detection is based on packets received no later than a specified time period prior to the switching occasion, then the UE may make the switching decision based on the results of the instant fading tracking. Otherwise, the UE may make the switching decision based on the results of the long term antenna gain tracking. | 05-05-2016 |
20160127008 | DYNAMIC SWITCH CONTROLLER - Radio-frequency (RF) modules are disclosed comprising an RF input port, an RF output port and an RF core configured operate in each of a plurality of operational states, the plurality of operational states including a first subset of operational states and a second subset of operational states. The RF module or device includes a decoder configured to receive an input signal indicating a first operational state of the RF core, the first operational state being of the first subset, generate an output control signal corresponding to the first operational state, detect a transition of the RF core to a second operational state, determine that the second operational state is of the second subset, and insert an intermediate output signal corresponding to an intermediate operational state of the RF core in response to said determination. | 05-05-2016 |
20160134258 | Switchable Filtering Circuit And The Operation Method Using The Same - The disclosure provides a switchable filtering circuit and the related operation method, in particular related to a filtering circuit which can be used for Bluetooth system and wireless local area network system. By using a first switch, a hybrid filtering circuit and a second switch, the received mode and transmitted mode between these two systems is realized. Moreover, the frequency responses and the bandwidth adjustments can be controlled according to the plurality of switchable resistors, the plurality of switchable capacitors and the shared and switchable resistors within the hybrid filter circuit. Moreover, the effects of high operated freedom of the circuit and the circuit size reduction can be achieved. | 05-12-2016 |
20160134380 | METHOD AND APPARATUS FOR CANCELLING SELF-INTERFERENCE SIGNAL BETWEEN TRANSMISSION ANTENNA AND RECEPTION ANTENNA - An apparatus for cancelling a self-interference signal between a transmission antenna and a reception antenna is disclosed. The apparatus includes a first self-interference signal cancellation unit for cancelling a self-interference signal in consideration of a linear channel between the transmission antenna and the reception antenna, a second self-interference signal cancellation unit for cancelling a self-interference signal in consideration of nonlinear channel characteristic between the transmission antenna and the reception antenna or linear characteristic of a radio channel, and a controller for comparing a transmitted signal output from the transmission antenna and a received signal received by the reception antenna to provide a first coefficient to be applied to self-interference signal cancellation of a linear device in the first self-interference signal cancellation unit and a second coefficient to be applied to self-interference signal cancellation of a nonlinear device in the second self-interference signal cancellation unit. | 05-12-2016 |
20160141753 | ELECTRONIC DEVICE AND METHOD FOR SELECTING ANTENNA OF ELECTRONIC DEVICE - In a method for selecting an antenna of an electronic device, one or more sensors are used to detect whether all of the antennas of the electronic device are approached by external objects. When all of the antennas are approached by the external objects, an approached antenna which has a largest value of received signal strength indication is selected. When not all of the antennas are approached by the external objects, an antenna which has a largest value of received signal strength indication and is not approached is selected. The selected antenna is set for transmitting and receiving wireless signals. | 05-19-2016 |
20160142095 | MULTIPLE RADIO FREQUENCY (RF) SYSTEMS USING A COMMON RADIO FREQUENCY PORT WITHOUT AN RF SWITCH - Methods and systems are disclosed for changing between multiple radio frequency (RF) systems. The method comprising transmitting, by a first radio frequency (RF) transmitter of a first RF system, a first RF signal from an antenna, receiving, by a first RF receiver of the first RF system, a second RF signal from the antenna, and receiving, by a second RF receiver of a second RF system, the second RF signal from the antenna, wherein a first RF port of the first RF system and a second RF port of the second RF system are both connected to a common RF port of the antenna, and wherein the first and second RF systems operate with overlapping frequency bands. | 05-19-2016 |
20160156346 | NON-LINEARITY COMPENSATION IN RADIO FREQUENCY SWITCHES AND DEVICES | 06-02-2016 |
20160156486 | Interference Canceling for Mobile Devices | 06-02-2016 |
20160164180 | ELECTRONIC DEVICE WITH PIFA TYPE ANTENNA AND WIRELESS SIGNAL TRANSMITTING/RECEIVING DEVICE THEREOF - Various exemplary embodiments of the present disclosure relate to an electronic device with a Planar Inverted-F Antenna (PIFA) type antenna and a wireless signal transmitting/receiving device of the electronic device. The electronic device may include: a PIFA (Planar Inverted-F Antenna) type antenna which is transmitting or receiving a wireless signal; a wireless communication unit which is processing the transmitted or received wireless signal; a printed circuit board which is mounted with the wireless communication unit and includes a ground area; a power feeding pad which is electrically connected with a signal transmitting/receiving terminal of the wireless communication unit, and connected with a power feeding section of the PIFA type antenna when the PIFA type antenna is equipped in the electronic device; a ground pad which is electrically connected with the ground area, and connected with a ground section of the PIFA type antenna when the PIFA type antenna is equipped in the electronic device; and a connection section which forms an electric route between the power feeding pad and the ground pad. Meanwhile, various exemplary embodiments may be made based on a technical idea of the present disclosure. | 06-09-2016 |
20160164567 | METHODS, DEVICES, AND COMPUTER PROGRAM PRODUCTS IMPROVING MOBILE COMMUNICATION - A system for use in a mobile device comprises: a switch unit configured to switch a common connection of a transmitter and a first receiver from a first antenna to a second antenna and a connection of a second receiver from the second antenna to the first antenna; and a processing system configured to receive at least two reception signals from the first and second receivers; in response to receiving the two reception signals, evaluate a communication link via the first and second antennae; based on the evaluation of the communication link, determine that the transmitter needs to transmit via the second antenna; obtain reception parameters used by said first and second receivers; cause the switch unit to switch the common connection of the transmitter and a first receiver so that the transmitter transmits via the second antenna; and exchange reception parameters between the at least two receivers. | 06-09-2016 |
20160173165 | TRANSFORMED KERNELS FOR CANCELLING NON-LINEAR DISTORTION | 06-16-2016 |
20160182104 | INTERFERENCE CANCELATION | 06-23-2016 |
20160182105 | INTERFERENCE CANCELATION | 06-23-2016 |
20160182117 | System and Method for Communicating with an Unpowered Device | 06-23-2016 |
20160182118 | APPARATUS AND METHODS FOR ANTENNA SHARING IN A MOBILE DEVICE | 06-23-2016 |
20160182120 | INTEGRATED TRANSMIT/RECEIVE SWITCH | 06-23-2016 |
20160191085 | TRANSMIT FRONT END MODULE FOR DUAL ANTENNA APPLICATIONS - Circuits, devices and modules for supporting dual or multi-antenna applications, are disclosed. In some embodiments, a front-end module includes a packaging substrate configured to receive a plurality of components, a first input port and a second input port configured to receive respective radio-frequency (RF) signals for amplification, a first antenna port and a second antenna port configured to output the amplified RF signals to respective antennas, and a front-end circuit. The front-end circuit can be implemented between the input ports and the antenna ports. The front-end circuit can include a power amplifier (PA) for each of the first and second input ports, an antenna switch configured to route the amplified RF signals from the PAs to their respective antenna ports, and a coupler implemented between the antenna switch and the antenna ports, the coupler configured to detect output power of the amplified RF signals. | 06-30-2016 |
20160191108 | MOBILE TERMINAL - A processor is configured to control a first communication module and a second communication module by executing a control program stored in a memory module such that communication at a first frequency included in a first frequency band or a second frequency included in a second frequency band is carried out using the first communication module, and such that communication at a third frequency included in a third frequency band is carried out using the second communication module. The first communication module includes an adjustment module. The adjustment module is configured to reduce interference between the first antenna and the second antenna when the communication at the third frequency is carried out. | 06-30-2016 |
20160197644 | DYNAMICALLY CONFIGURABLE ANTENNAS | 07-07-2016 |
20160197645 | APPLIANCE FOR THE SWITCHING OF RADIOFREQUENCY SIGNALS | 07-07-2016 |
20160204824 | ANTENNA MODULE, WIRELESS DEVICE, AND FIELD DEVICE CONTROL SYSTEM | 07-14-2016 |
20160380666 | TRANSCEIVER DEVICE AND METHOD OF PROCESSING SIGNALS - A method of processing signals may include calculating a covariance matrix and a correlation vector based on an input signal vector and an output signal vector; identifying a plurality of critical elements of a parameter vector based on a predefined criteria, wherein the parameter vector describes a relationship between the input signal vector and the output signal vector; calculating a solution to a linear system to generate a reduced parameter update vector having a plurality of elements, wherein the linear system is based on the plurality of critical elements of the parameter vector, the covariance matrix, and the correlation vector; updating the plurality of critical elements of the parameter vector using the reduced parameter update vector to generate an updated parameter vector, wherein the reduced parameter update vector has less elements than the parameter vector; and processing one or more signals associated with the input signal vector using the updated parameter vector. | 12-29-2016 |
20160380706 | ARCHITECTURE AND CONTROL OF ANALOG SELF-INTERFERENCE CANCELLATION - An apparatus for interference cancellation in wireless communication systems configured for reception, comprises a receive signal path configured to convey an overall receive (Rx) signal comprising an Rx signal and a residual transmit (Tx) signal, from an antenna port to an Rx input port of a transceiver, and at least one cancellation path configured to receive a leakage Tx signal from the antenna port. Further, the apparatus comprises a cancellation unit configured to apply a cancellation signal to the overall Rx signal in the receive signal path and a compensation unit configured to generate the cancellation signal by modifying the leakage Tx signal in the cancellation path, based on a compensation control signal. In addition, the apparatus comprises a feedback receiver unit configured to generate the compensation control signal based on the residual Tx signal in the overall Rx signal and the cancellation signal. | 12-29-2016 |
20170237474 | DIGITAL REMOTE ANTENNAS OPERATION | 08-17-2017 |
20180026671 | HIGH-FREQUENCY SWITCH MODULE | 01-25-2018 |
20190149178 | UPLINK CARRIER AGGREGATION AND SIMULTANEOUS MIMO USING A DIPLEXER BETWEEN AN ANTENNA AND AN ANTENNA SWITCH MODULE | 05-16-2019 |