Entries |
Document | Title | Date |
20080200132 | METHOD FOR PRODUCING LAYOUT OF SEMICONDUCTOR INTEGRATED CIRCUIT WITH RADIO FREQUENCY DEVICES - A method for producing an IC layout with radio frequency devices is provided. The method has following steps. Type information of at least one RF device is inputted, and at least one RF parameter corresponding to the RF device is inputted as well. A frequency response result is then generated based on the type information and the RF parameter. When the frequency response result meets the required specification, an IC layout process is performed based on the frequency response result. However, when the frequency response result doesn't meet the required specification, another RE parameter is inputted again to produce new frequency response result. | 08-21-2008 |
20080242239 | SOFTWARE-DEFINABLE RADIO TRANSCEIVER WITH MEMS FILTERS - A transceiver apparatus comprising a software-definable-radio-transceiver architecture. The transceiver apparatus comprises at least one up-conversion path including at least one configurable micro-electro-mechanical-system (MEMS) transmit filter communicatively coupled to transmit output from a digital-to-analog converter to an antenna, and at least one down-conversion path including at least one configurable-MEMS-receive filter communicatively coupled to transmit signals received from the antenna to an analog-to-digital converter. The at least one configurable-MEMS-transmit filter prevents interference on the up-conversion path from signals transmitted from the antenna. The at least one configurable-MEMS-receive filter prevents interference on the down-conversion path from signals transmitted to the antenna. A plurality of upconversion and downconversion paths can operate simultaneously and on different channel frequencies. | 10-02-2008 |
20080254752 | APPARATUS AND METHOD FOR TRANSMITTING DATA AND APPARATUS AND METHOD FOR RECEIVING DATA - Provided are an apparatus and method for transmitting data and an apparatus and method for receiving data, in which beam forming is performed in consideration of the communication capabilities of antennas of stations that perform directional communication in a high-frequency band. The apparatus for transmitting data includes a communication-capability-determination module which determines the communication capability of a receiver (RX) antenna module of a receiving station based on communication-capability data transmitted by the receiving station; an antenna-control module which controls a transmitter (TX) antenna module according to a beam-forming mode determined based on the communication capability of the RX antenna module and the communication capability of the TX antenna module; and a communication module which transmits data through the TX antenna module, wherein the beam-forming mode determines whether to transmit a TX antenna weight vector (AWV) pattern, whether to receive a feedback response pattern and whether to transmit an RX AWV pattern. | 10-16-2008 |
20080299913 | ON CHIP MOS TRANSMIT / RECEIVE SWITCH - On-chip MOS circuitry couples a communication path between an output stage amplifier and an output port and disables a circuit path between an input amplifier and the output port by creating a high impedance circuit during transmit operations. Alternatively, the circuitry opens the transmit circuit path with an isolated MOSFET and enables the second circuit path by creating an impedance matched circuit. The switch is formed within an isolated region to allow it to float with a signal to avoid breakdown. This floating MOS switch can be used for a variety of other applications in addition to its use as a transmit/receive switch even though formed on the same die as the communication circuitry. | 12-04-2008 |
20080299914 | Electronic component for communication device and semiconductor device for switching transmission and reception - There are provided a transmission/reception switching circuit which is small in insertion loss and harmonic distortion and allows an increase in the output power of a power amplifier and an electronic component for communication on which the transmission/reception switching circuit is mounted. As an element composing a transmission/reception switching circuit in a wireless communication system, series-connected FETs or a multi-gate FET are used in place of a diode. Gate resistors connected between the individual gate terminals and a control terminal are designed to have resistance values which become progressively smaller from the gate to which a highest voltage is applied toward the gate to which a lowest voltage is applied. | 12-04-2008 |
20090029654 | Using radio frequency transmit/receive switches in radio frequency communications - A metal oxide semiconductor radio frequency transmit/receive switch may enable lower costs and smaller size. The switch uses an inductor and a capacitor circuit to isolate the power amplifier from the low noise amplifier. Metal oxide semiconductor switches are utilized to switch between transmit and receive modes. | 01-29-2009 |
20090047914 | MULTI-MODE RADIO WITH INTERFERENCE CANCELLATION CIRCUIT - A multi-mode wireless transmit/receive unit (WTRU) includes at least one antenna, first and second communication mode receivers and a first communication mode transmitter. The first and second receivers simultaneously receive signals from the antenna. The first transmitter generates and sends a first type of signal to the antenna while, at the same time, the second receiver receives a second type of signal from the antenna. In a preferred embodiment, the WTRU further includes a vector multiplier configured to reduce or eliminate interference of signals received by the second receiver, the interference being caused by the first transmitter. The vector multiplier adjusts the phase and amplitude of noise (i.e., spurious in-band noise) measured by the second receiver. The WTRU may further include a second communication mode transmitter configured to generate and send a second type of signal to the antenna. | 02-19-2009 |
20090068963 | COMMON MODE SIGNAL ATTENUATION FOR A DIFFERENTIAL DUPLEXER - Techniques for attenuating undesired signal components from a differential duplexer are described. The duplexer provides a differential received signal at RX+ and RX− ports. This differential received signal includes an undesired common mode signal, which may come from a transmit signal. The common mode signal is attenuated with a common mode trap in an impedance matching network coupled to the RX+ and RX− ports. The matching network includes a first passive circuit coupled between the RX+ port and a first node, a second passive circuit coupled between the RX− port and a second node, and the common mode trap coupled between the first and second nodes. In one design, the common mode trap includes a first inductor coupled between the first node and a common node, a second inductor coupled between the second node and the common node, and a capacitor coupled between the common node and circuit ground. | 03-12-2009 |
20090075604 | HIGH FREQUENCY MODULE - A high frequency module for transmitting and receiving, for example, communication signals of GSM/DCS/PCS/WCDMA systems through a single antenna, is provided at a relatively small size and low cost. The high frequency module includes a diplexer arranged to separate communication signals from the antenna into GSM communication signals in lower frequency bands and PCS/DCS/WCDMA communication signals in higher frequency bands, a diode switch circuit that is connected to a input and output terminal of the GSM communication signal of the diplexer and is arranged to switch transmission and reception of the GSM communication signal, and a multipoint GaAsIC switch that is connected to the GSM/DCS/PCS/WCDMA communication signals of the diplexer and is arranged to switch transmission and reception of these signals. The high frequency module switches the four types of communication signals by changing the patterns of controls signals VcG, VC | 03-19-2009 |
20090104881 | Switching element, antenna switch circuit and radio frequency module using the same - A switching element is provided that realizes an stabilize a potential between the gates of the multi-gates without an increase in the insertion loss, and an antenna switch circuit and a radio frequency module each using the switch element. The switching element includes two ohmic electrodes | 04-23-2009 |
20090137215 | PROGRAMMABLE ANTENNA INTERFACE WITH ADJUSTABLE TRANSFORMER AND METHODS FOR USE THEREWITH - A programmable antenna interface for coupling an antenna to a transceiver having a receiver section and a transmitter section, includes a transformer that is adjustable in accordance with a control signal. A transmit/receive module couples the transformer to the receiver section in a receive mode and to the transmitter section in a transmit mode. The control signal controls the transformer to a first impedance in the transmit mode and controls the transformer to a second impedance in the receive mode. | 05-28-2009 |
20090253384 | Dual Mode Radio Frequency Front End Circuit - A dual mode radio frequency (RF) front end circuit includes a first transformer for conversion between a balanced and an unbalanced RF signal and a second transformer for conversion between a balanced and an unbalanced RF signal. A first switch is configured to selectively electrically connect to one of the first transformer, the second transformer and an RF transmit port. A second switch is configured to selectively electrically connect the first switch and a filter to one of the input and the output port of an amplifier. The first switch is connected to the input port of the amplifier when the filter is connected to the output port of the amplifier, and the first switch is connected to the output port of the amplifier when the filter is connected to the input Port of the amplifier. The first and the second switch cooperatively selectively connect one of the first transformer, the second transformer and the RF transmit port to the amplifier and the filter. | 10-08-2009 |
20090253385 | System and Method for Adaptive Antenna Impedance Matching - Methods and apparatus are disclosed for automatically adjusting antenna impedance match in a wireless transceiver employing phase-amplitude modulation. According to some embodiments of the invention, a wireless transceiver comprises a transmitter circuit and a receiver circuit connected to the antenna by a transmit/receive duplexer. An electronically adjustable matching network is located between the transmitter output and the antenna. To control the adjustable matching network, a directional coupler is located between the transmitter output and the matching network to separate transmit signals reflected from the antenna system, including the antenna, the matching network and the T/R duplexer. The reflected transmit signals are routed to the receiver circuit, which digitizes the reflected signal and determines an antenna reflection coefficient based on the digitized reflected signal and the modulation signal used to create the transmit signal. The complex antenna reflection coefficient is used to determine any adjustment needed to the antenna matching network. | 10-08-2009 |
20090264084 | Transceiver with Isolated Receiver - A transceiver includes a transmitter configured to transmit a first radio frequency signal, a switching device connected to the transmitter and configured to receive and transmit the first radio frequency signal to an antenna, a receiver connected to the switching device via an input and configured to receive a second radio frequency signal from the switching device, the receiver including an electrostatic discharge protection device connected to the input, and a biasing device connected to the electrostatic discharge protection device and configured to forward bias the electrostatic discharge protection device. | 10-22-2009 |
20090286492 | RF SWITCH AND TRANSMIT AND RECEIVE MODULE COMPRISING SUCH A SWITCH - The present invention relates to a device for switching an RF signal. It also relates to a transmit and receive module comprising such a switch. The device includes at least one branch linking a first pole to a second pole, a branch comprising a conducting line coupled to a reference potential, it comprises at least one Gallium Nitride (GaN) semi-conductor elementary switch, for example a transistor, linking the line to the reference potential, the RF signal propagating along the line when the semi-conductor is driven to the on state. In the transmit and receive module, the device links the transmit pathway and the receive pathway to an antenna. The invention applies notably in transmit and receive modules of airborne systems operating in a broad band of frequencies or in a narrow band. | 11-19-2009 |
20090298443 | HIGH-ISOLATION TRANSMIT/RECEIVE SWITCH ON CMOS FOR MILLIMETER-WAVE APPLICATIONS - A CMOS monolithic transmit/receive switch comprises a single pole double throw switch (SPDT) module operable to selectively connect an antenna port to either a transmit port or to a receive port. A transmit matching network comprising a first transmission line matches the impedance of the transmit port of the SPDT module to a transmit impedance, and a first shunt transistor is operable to selectively ground a transmitter end of the first transmission line. A receive matching network comprising a second transmission line matches the impedance of the receive port of the SPDT module to a receive impedance, and a second shunt transistor is operable to selectively ground a receiver end of the second transmission line. | 12-03-2009 |
20100105340 | INTERFACE FOR WIRELESS COMMUNICATION DEVICES - Apparatuses for providing wireless communication in a device are presented for use with a plurality of antennas including a receive antenna and a transmit antenna. The apparatuses may include a power amplifier arrangement in a transmit path coupled to the transmit antenna. The power amplifier arrangement may include, for example, at least two amplifiers that are arranged either in series with a filter coupled there between or at least two amplifiers that are arranged separately between a switch and a frequency domain multiplexer. | 04-29-2010 |
20100144289 | ELECTRICALLY TILTED ANTENNA SYSTEM WITH POLARISATION DIVERSITY - An electrically tilted antenna system with polarisation diversity has a dual polarised, tilt adjustable antenna ( | 06-10-2010 |
20100197245 | METHOD FOR PRODUCING RADIOFREQUENCY COMMUNICATION DEVICES WITH OR WITHOUT OPERATION SWITCH AND DEVICES THUS OBTAINED - A method for producing radiofrequency communication devices with or without an operation switch and devices obtained. The invention relates to a method for producing a radiofrequency communication device comprising an electronic component, an antennae circuit associated with the electronic component and a switch on the circuit capable of switching off the antennae circuit; the method being differentiated in that comprises the following steps: —the antennae ( | 08-05-2010 |
20100203844 | RADIO FREQUENCY TRANSCEIVER FRONT END CIRCUIT - 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 |
20100203845 | SINGLE INPUT/OUTPUT PORT RADIO FREQUENCY TRANSCEIVER FRONT END CIRCUIT WITH LOW NOISE AMPLIFIER SWITCHING TRANSISTOR - 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 |
20100203846 | RADIO FREQUENCY TRANSCEIVER FRONT END CIRCUIT WITH PARALLEL RESONANT CIRCUIT - 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 |
20100216414 | Apparatus and Method for Controlling a Signal - The disclosed embodiments relate to an apparatus and method for controlling transmission of a signal in a communications device in order to prevent interference. An apparatus is described that includes a transmitter for transmitting a signal, an antenna coupled to the transmitter for radiating the signal in a radiated polarization pattern, and a controller for adjusting the transmitter when the radiated signal exhibits an undesired polarization pattern. A method is also described that includes the steps of producing a signal for transmission, radiating the signal in a polarization pattern, and adjusting the production of the signal for transmission when the radiated signal exhibits an undesired polarization. | 08-26-2010 |
20100267349 | APPARATUS AND METHOD FOR ISOLATION AND POWER HANDLING IN A RADIO FREQUENCY SWITCH - A transmit/receive switching circuit is provided. The transmit/receive switching circuit comprises a first transformer to split a transmission signal into a first split transmission signal and a second split transmission signal. The first split transmission signal is out of phase with the second split transmission signal. The transmit/receive switching circuit also comprises a second transformer to split a received signal into a first split received signal and a second split received signal and to combine the first split transmission signal and the second split transmission signal. The first split received signal is out of phase with the second split received signal. The combined transmission signal is supplied to an antenna port and the received signal is received from the antenna port. The transmit/receive switching circuit also comprises a third transformer to combine the first split received signal and the second split received signal and to supply the combined received signal to a receive port of the transmit/receive switch. Finally, the transmit/receive switching circuit comprises first and second switches. Both the first and second switches are coupled to the first transformer and to the second transformer. The first switch switches between coupling the first split transmission signal to the second transformer and coupling the first split received signal to the third transformer. The second switch switches between coupling the second split transmission signal to the second transformer and coupling the second split received signal to the third transformer. | 10-21-2010 |
20100279630 | Radio frequency power monitor - An exemplary apparatus for monitoring power of RF energy includes a transmit/receive switch configured to switch an antenna between a transmitter state and a receiver state. The switch includes a diode. The exemplary apparatus can include an output device configured to monitor voltage across the diode of the switch to detect power of RF energy of the antenna. An exemplary method of monitoring power during transmission or reception of a signal can include placing a transmit/receive switch configured to switch an antenna between a transmitter and a receiver into one of a receiver state or a transmitter state. The exemplary method can include detecting voltage across a diode configured as a switching element in the transmit/receive switch to monitor power, and providing an output indicative of the monitored power. | 11-04-2010 |
20100297959 | Antenna Selection - A communication device arranged to operate in accordance with a communication protocol in which a transmitting device is scheduled to commence a transmission at a time known in advance to the receiving device, includes at least two antennas and is arranged to select one of those antennas to receive a transmission from a transmitting device by, immediately before the transmitting device is scheduled to commence its transmission: assessing a quality of a signal received by means of a first one of the antennas; assessing a quality of a signal received by means of a second one of the antennas; and determining, based on the assessed quality of the signals received by means of the first and second antennas, the antenna to be used for receiving the transmission from the transmitting device. | 11-25-2010 |
20100297960 | Switching element, antenna switch circuit and radio frequency module using the same - A switching element is provided that realizes an stabilize a potential between the gates of the multi-gates without an increase in the insertion loss, and an antenna switch circuit and a radio frequency module each using the switch element. The switching element includes two ohmic electrodes | 11-25-2010 |
20100304693 | HIGH FREQUENCY SWITCH MODULE - A high frequency switch module includes a laminated circuit component that includes an antenna electrode connected to a single antenna, a plurality of communication electrodes connected to a plurality of high frequency communication circuits to transmit, receive, or transmit and receive plural kinds of communication signals, and a land arranged to mount a switch IC on, and a switch IC that is mounted on the laminated circuit component and includes a common terminal connected to the single antenna through the laminated circuit component, and a plurality of communication circuit terminals connected to the plurality of high frequency communication circuits through the laminated circuit component. The switch IC is provided with switch circuits between the communication circuit terminals and the common terminal, and all of the switch circuits have the same or substantially the same resistance against transmission power applied at the time of transmission. | 12-02-2010 |
20110021162 | SYSTEM FOR TRANSMITTING/RECEIVING MULTI-BAND RADIO FREQUENCY SIGNAL USING DUAL INPUT, DUAL OUTPUT FILTER - A system for transmitting/receiving a multi-band Radio Frequency (RF) signal using a Dual Input, Dual Output filter is provided. The system may include a Single-Input Single-Output (SISO) filter and the Dual Input, Dual Output filter. The system for transmitting/receiving a multi-band Radio Frequency (RF) may be implemented in a Radio Frequency (RF) region, which includes an area from an end of an antenna to an end of a mixer in a mobile communication. | 01-27-2011 |
20110053525 | COUPLING APPARATUS FOR DIVIDING RECEIVING AND TRANSMITTING SIGNALS AND CONTROL METHOD THEREOF - The present invention is directed to reducing leakage of a transmitting signal to a receiving unit in a wireless communication system with a transmitting unit and the receiving unit sharing an antenna. A coupling apparatus for dividing a radio frequency (RF) transmitting signal and an RF receiving signal in a transceiver with a transmitting unit and a receiving unit sharing an antenna, includes: a four-port circuit having port | 03-03-2011 |
20110081873 | FILTER, TRANSMITTER-RECEIVER, AND AMPLIFYING CIRCUIT - A filter includes: an input terminal to which a fundamental wave signal and a harmonic signal group of the fundamental wave signal are supplied; an output terminal configured to output the fundamental wave signal supplied to the input terminal; a transmission line configured to connect the input terminal and the output terminal; an open-end stub configured to be provided corresponding to an odd harmonic signal among the harmonic signal group, coupled to the transmission line, and has a length corresponding to one quarter of a wavelength of the corresponding odd harmonic signal; a first short-end stub configured to be coupled to the transmission line and has a length corresponding to one quarter of a wavelength of the fundamental wave signal; and a second short-end stub configured to be coupled to the transmission line. | 04-07-2011 |
20110086596 | SIGNAL SPLITTING DEVICE AND WIRELESS COMMUNICATION DEVICE USING THE SAME - A signal splitting apparatus comprises a micro-strip line, a first inductor and a second inductor. A first end and a second end of the micro-strip line are grounded via a first capacitor and a second capacitor, respectively. The first end and the second end of the micro-strip line are electrically coupled to a receiving part of a transceiver and a transmitting part of the transceiver, respectively. One end of the first inductor is coupled to the first end of the micro-strip, and the other end of the first inductor is electrically coupled to an antenna module and grounded via a third capacitor. One end of the second inductor is coupled to the second end of the micro-strip, and the other end of the second inductor is electrically coupled to the antenna module. | 04-14-2011 |
20110105053 | VARIABLE INDUCTOR, AND OSCILLATOR AND COMMUNICATION SYSTEM USING THE SAME - There are provided a variable inductor with little degradation in quality factor, and an oscillator and a communication system using the variable inductor. An inductance controller comprising a reactance device with a variable device value, such as, for example, a variable capacitor, is connected to a secondary inductor, magnetically coupled to a primary inductor through mutual inductance. The inductance controller is provided with an inductance control terminal for receiving a control signal for controlling capacitance of the variable capacitor. Inductance of the primary inductor is varied by varying the capacitance by the control signal. | 05-05-2011 |
20110143691 | APPARATUS FOR EMITTING AND RECEIVING RADIO-FREQUENCY SIGNALS, COMPRISING A CIRCUIT TO CANCEL INTERFERENCES - An apparatus for emitting and receiving radio-frequency signals, the apparatus including a circuit to cancel interferences. | 06-16-2011 |
20110212696 | System and Method for Reducing In-Band Interference for a Shared Antenna - An interference compensation circuit for suppressing in-band or nearby out-of-band interference in a shared antenna communication system. The communication system can include a first communication device having a transmitter for transmitting signals within a first frequency band and a second communication device having a receiver for receiving electromagnetic signals within a second frequency band. The second frequency band can be adjacent or overlapping the first frequency band. The communication system also can include an interference compensation circuit that receives samples of the signals transmitted by the transmitter and generate an interference compensation signal in response to adjusting amplitude, phase, and/or delay of the samples. The interference compensation signal can suppress interference imposed on the receiver by the signals transmitted by the transmitter when applied to a signal receive path of the receiver. | 09-01-2011 |
20110294444 | SWITCHING DEVICE, RADIO FREQUENCY SIGNAL SWITCH, AND RADIO FREQUENCY SIGNAL AMPLIFICATION MODULE - A small switching device capable of implementing low-distortion characteristics formed on a semiconductor substrate to switch radio frequency signal paths is provided. An FET which is an example of switching device formed on a semiconductor substrate | 12-01-2011 |
20110294445 | Semiconductor Antenna Switch - A semiconductor antenna switch has an antenna terminal, a transmission terminal and a reception terminal. The antenna switch is capable of reducing harmonic distortion even though it includes field effect transistors formed over a silicon substrate. A shunt transistor including a plurality of series-connected field effect transistors is connected between he transmission terminal and a common terminal, such as a common terminal, which may be an electrical ground. Off capacitances and/or gate widths of a plurality of the series-connected field effect transistors increase monotonically in the direction from the common terminal to the transmission terminal, or equivalently, decrease monotonically in the direction from the transmission terminal to the common terminal. | 12-01-2011 |
20110319039 | RF CIRCUIT - Demodulation/modulation circuit provides the RF circuit which had demodulation/modulation circuit working by a common component built-in at both the recovery and the modulation substantially. Demodulation/modulation circuit | 12-29-2011 |
20110319040 | RF INTEGRATED CIRCUIT FOR DEVELOPMENT - It is become accumulation independently with physical layer circuit and the MAC circuit, and an RF integrated circuit for development for the radio transmission and reception that the interface frequency with the physical layer circuit has width of at least around 10 MHz toward is related to. It is RF integrated circuit | 12-29-2011 |
20120015612 | WIRELESS TRANSCEIVER APPARATUS HAVING CIRCUIT UNIT FORMING FREQUENCY RESONANCE MODE WHEN OPERATED UNDER RECEPTION MODE - A wireless transceiver apparatus is provided. The wireless transceiver apparatus includes a signal transmitting circuit, a circuit unit, and a signal receiving circuit. The signal transmitting circuit includes a first output port and is utilized for outputting a first transmission signal via the first output port in a transmission mode. The circuit unit is coupled to the first output port of the signal transmitting circuit. The signal receiving circuit includes a first receiving port and is utilized for receiving a first wireless communication signal via the first receiving port in a reception mode. The first output port is coupled to the first receiving port at a first node. The circuit unit forms a frequency resonance mode to increase an impedance value of the signal transmitting circuit seen by a signal at the first node. | 01-19-2012 |
20120034883 | WIRELESS TRANSCEIVER - A wireless transceiver comprises an antenna, a switch, a first receiver amplifier, a second receiver amplifier, a transmitter, a receiver, and a signal processor. The switch connects to the antenna and the transmitter respectively. The second receiver amplifier connects to the first receiver amplifier via the receiver. The signal processor connects to the first receiver amplifier and the second receiver amplifier respectively and controls working modes of the first receiver amplifier and the second receiver amplifier. | 02-09-2012 |
20120064843 | DATA COMMUNICATION DEVICE - A communication device as disclosed herein may include a body, an antenna assembly provided in the body, and configured to transmit or receive wireless signals, and a circuit board connected to the antenna assembly and configured to process the wireless signals. The antenna assembly may include a carrier having at least one region that is dimensioned to be farther away from the body than other portions thereof, and a radiator provided on the at least one dimensioned region of the carrier and configured to receive or radiate electromagnetic waves corresponding to the wireless signals. The radiator may be positioned on the dimensioned region of the carrier such that a specific absorption rate (SAR) due to the antenna assembly is reduced. | 03-15-2012 |
20120083224 | ANTENNA SWITCH WITH ESD ISOLATION - A triple winding balun is combined with multiple switch assemblies to implement an antenna switch that provides good isolation, low loss, and good linearity with only a minor increase to the overall chip footprint. The antenna switch also isolates the receiver from power surges, where the power surges may be due to electrostatic discharge, undesirable WiMAX/LTE signals, etc. An exemplary antenna switch comprises a triple winding balun, a first switch subassembly, and an optional second switch subassembly. During stand-by and transmit modes, the first and second switch subassemblies respectively isolate the receiver from transmitter output current and connect a positive voltage bias to the third winding to prevent negative voltage swings at the receiver. During the receive mode, the configuration of the first and second switch subassemblies flips to connect the receiver to the third winding of the balun and to isolate the receiver from power surges. | 04-05-2012 |
20120190313 | COMPACT SWITCH WITH ENHANCED LINEARITY PERFORMANCE - A switch element includes a switch device having a drain, a source and a plurality of gates, and at least one additional interconnect located between the plurality of gates, the additional interconnect operative to establish a constant potential between the at least two gates. | 07-26-2012 |
20120252377 | HIGH FREQUENCY ANTENNA SWITCH MODULE - In a high frequency antenna switch module, an I/O interface generates various control signals for controlling a switch module on the basis of a system data signal and a system clock, a decoder generates a switch control signal SWCNT for controlling a switch in response to a control signal CNT in the control signals, a timing detector for switch-ports switching generates a switch-port switching detection signal t_sw in response to the switch control signal, a frequency control signal generator generates frequency control signals ICONT and CCONT in response to the signal t_sw, and a negative voltage generation circuit generates a negative voltage output signal NVG_OUT while switching the frequency of the clock signal generated in the negative voltage generation circuit to different frequencies in response to signals ICONT and CCONT. The switch switches the paths among the plural switch ports in response to the signals SWCNT and NVG_OUT. | 10-04-2012 |
20120289173 | INTERFACE OF MULTI CHIP MODULE - Disclosed herein is an interface of a multi chip module transmitting and receiving data among a plurality of chips. An interface of a multi chip module includes a communication unit that is provided in the chips and transmits and receives the data; and a radio communication unit that is provided outside the chips, converts the data transmitted from the communication unit into radio signals and wirelessly transmits the radio signals, and demodulates radio signals received from other chips into data and transmits the data to the communication unit, whereby wired communication chips can implement radio communication. | 11-15-2012 |
20120295559 | Transmit/Receive Switch - A transceiver includes a first circuit having a connector for connection to an antenna and receiving circuitry, and a second circuit having transmitting circuitry. The first and second circuits are coupled using a balun, where the balun is arranged so that its unbalanced side is in the first circuit and its balanced side is in the second circuit. | 11-22-2012 |
20120309329 | Device and equipment for four-frequency transceiving of global system for mobile communication - The present disclosure discloses a device for four-frequency transceiving of a Global System for Mobile Communication (GSM), comprising a Power Amplifier (PA), a radio frequency transceiving chip, a baseband control chip, an antenna switch, a GSM low frequency filter and a GSM high frequency filter. The antenna switch receives a control signal transmitted from the baseband control chip, and the antenna switch connects to a corresponding line according to the control signal, and transmits signals between the antenna and the connected line; the GSM low frequency filter receives the signals of a first frequency band or a second frequency band which are transmitted by the antenna switch, and passes the signals of the first frequency band or the second frequency band; the GSM high frequency filter receives the signals of a third frequency band or a fourth frequency band which are transmitted by the antenna switch, and passes the signals of the third frequency band and the fourth frequency band. The present disclosure also discloses an equipment for four-frequency transceiving of GSM. By adopting the device and the equipment disclosed by the present disclosure, lines can be simplified, and the cost can be reduced. | 12-06-2012 |
20130005279 | SEMICONDUCTOR SWITCH AND WIRELESS DEVICE - According to one embodiment, a semiconductor switch includes a switch section, a driver, and a power supply. The switch section switches a connection between a common terminal and a plurality of radio-frequency terminals. The driver outputs a control signal to the switch section based on a terminal switching signal. The power supply generates a first potential based on a reference potential varying in accordance with temperature and outputs the first potential to the driver. | 01-03-2013 |
20130023221 | RF ANTENNA SWITCH CIRCUIT, HIGH FREQUENCY ANTENNA COMPONENT, AND MOBILE COMMUNICATION DEVICE - The present invention relates to an RF antenna switch circuit, a high frequency antenna component, and a mobile communication device. According to the present invention, an RF antenna switch circuit including: an antenna; an input/output terminal including at least one transmitting terminal and at least one receiving terminal; at least one transmitting switch block disposed on a transmitting path(s) between the at least one transmitting terminal and a common node; at least one receiving switch block disposed on a receiving path(s) between the at least one receiving terminal and the common node; and a common switch block sharing a switching device and turned on by synchronizing with each of transmitting and receiving operations on transceiving the signal through the antenna is provided. When one of the transmitting and receiving operations is turned on, the other is turned off. | 01-24-2013 |
20130029614 | Systems, Methods, and Apparatuses for Negative-Charge-Pump-Based Antenna Switch Controllers Utilizing Battery Supplies - Systems, methods, and apparatuses may provide for antenna switch controllers. An example antenna switch controller may include: a plurality of antenna switches commonly connected to one or more antennas, where each of the plurality of antenna switches includes a plurality of stacked transistors, where one of the plurality of antenna switches is enabled when transmitting or receiving one or more radio frequency (RF) signals via the one or more antennas; a voltage generator that receives an external supply voltage from a battery, where the voltage generator generates an internal supply voltage, where the internal supply voltage remains constant despite fluctuations in the external supply voltage from the battery; a clock buffer that generates clock signals from the constant internal supply voltage; and a charge pump that receives the clock signals and generates a constant negative voltage, where the constant negative voltage is for biasing of one or more of the plurality of antenna switches that are disabled. | 01-31-2013 |
20130035048 | RADIO FREQUENCY FRONT END SYSTEM WITH AN INTEGRATED TRANSMIT/RECEIVE SWITCH - A Radio Frequency (RF) front end system and method are disclosed. The RF front end system comprises an antenna, a matching network coupled to the antenna, a power amplifier (PA) coupled to the matching network via a port on a transmit path, a low noise amplifier (LNA) coupled to the matching network via the port on a receive path and at least one transmit/receive switch (T/R SW) coupled between the port and at least one of the PA and LNA. | 02-07-2013 |
20130052969 | SEMICONDUCTOR SWITCH AND WIRELESS DEVICE - According to one embodiment, a semiconductor switch includes a power supply, a driver, a switch section, and a first potential controller. The power supply includes a first potential generator and a second potential generator. The first potential generator is configured to generate a negative first potential. The second potential generator is configured to generate a positive second potential that a power supply potential is stepped down. The driver is supplied with the first potential and a third potential and configured to output at least one of the first potential and the third potential based on a terminal switching signal. The switch section is configured to connect a common terminal to any one of a plurality of radio frequency terminals according to an output of the driver. The first potential controller includes a divider and an amplifier. | 02-28-2013 |
20130072135 | WIRELESS COEXISTENCE THROUGH ANTENNA SWITCHING - Systems, methods, and other embodiments associated with wireless coexistence through antenna switching are described. According to one embodiment, a method includes selecting one or both of a first transceiver and a second transceiver for connection to an antenna, based, at least in part, on the operating mode of the first transceiver and the second transceiver. The method includes connecting the selected transceiver(s) to the antenna, such that the selected transceiver(s) is enabled to communicate on the antenna and any transceiver(s) not selected is not able to communicate on the antenna. | 03-21-2013 |
20130165057 | RF TRANSMISSION CIRCUIT AND ELECTRONIC DEVICE AND METHOD FOR SAVING POWER THEREOF - A radio frequency (RF) transmission circuit and an electronic device and a method for saving power thereof are provided. The RF transmission circuit includes: an antenna, at least one controller, a first path, a second path and a signal switching unit. The controller generates and/or receives RF signal. The controller has a determination function determining power of the RF signal and a switching function selecting or changing the transmission path of the RF signal as the first path and the second path. The first path transmits the RF signal to the antenna. The second path has a power amplifier to amplify the power of the RF signal and then transmit the amplified RF signal to the antenna. The signal switching unit selectively connects the antenna to the first path or the second path. When the first path is selected, the controller turns off the power amplifier. | 06-27-2013 |
20130252563 | METHODS AND APPARATUS FOR RESOURCE SHARING FOR VOICE AND DATA INTERLACING - Methods and apparatus for voice and data interlacing in a system having a shared antenna. In one embodiment, a voice and data communication system has a shared antenna for transmitting and receiving information in time slots, wherein the antenna can only be used for transmit or receive at a given time. The system determines timing requirements for data transmission and reception and interrupts data transmission for transmission of speech in selected intervals while meeting the data transmission timing and throughput requirements. The speech can be manipulated to fit with the selected intervals, to preserve the intelligibility of the manipulated speech. | 09-26-2013 |
20130273861 | DEVICES FOR SWITCHING AN ANTENNA - A switchplexer is described. The switchplexer includes switches that are coupled to an antenna. The switchplexer also includes ports. Each of the switches is separately coupled to one of the ports. The switchplexer also includes controlling circuitry coupled to the switches. The controlling circuitry concurrently closes at least two of the switches when indicated by a control signal. | 10-17-2013 |
20130324058 | Wireless Communication Device - A wireless communication device includes an antenna, a transceiver, a filter circuit and an attenuation circuit. The transceiver includes a transmission electrode and a receive electrode, and communicates with an external device through the antenna. The filter circuit is coupled between the transmission electrode and the antenna, and includes a harmonic trap circuit that eliminates a harmonic element of a carrier frequency of an outgoing signal provided from the transceiver through the transmission electrode. The attenuation circuit is coupled between the receive electrode and the antenna, and provides an incoming signal received through the antenna to the receive electrode after reducing a voltage of the incoming signal. | 12-05-2013 |
20140024323 | RADIO COMMUNICATION DEVICES AND METHODS FOR CONTROLLING A RADIO COMMUNICATION DEVICE - A device a radio communication device may be provided. The radio communication device may include: an antenna configured to operate in a plurality of operation modes; a receiver configured to receive a first channel signal and a second channel signal using the antenna; and a mode switching circuit configured to switch an operation mode of the antenna if the first channel signal fulfils a first channel specific criterion or configured to switch an operation mode of the antenna if the second channel signal fulfils a second channel specific criterion. | 01-23-2014 |
20140073268 | RF FRONT END MODULE AND MOBILE WIRELESS DEVICE - A wireless communication module comprising including a first transmission bandpass filter that takes a first transmit frequency band as a passband; a second transmission bandpass filter that takes a second transmit frequency band as a passband; a first reception bandpass filter that takes a first receive frequency band as a passband; a second reception bandpass filter that takes a second receive frequency band as a passband; and a plurality of switches, each switch connected to a single one of the bandpass filters | 03-13-2014 |
20140073269 | WIRELESS TRANSCEIVER APPARATUS HAVING CIRCUIT UNIT FORMING FREQUENCY RESONANCE MODE WHEN OPERATED UNDER RECEPTION MODE - A wireless transceiver apparatus is provided. The wireless transceiver apparatus includes a signal transmitting circuit comprising an output port for outputting a transmission signal in a transmission mode, the signal transmitting circuit further comprising an inductive component. The wireless transceiver apparatus also includes a circuit unit coupled to the output port of the signal transmitting circuit, the circuit unit comprising a capacitive component and a signal receiving circuit comprising a receiving port for receiving a wireless communication signal in a reception mode. The output port is coupled to the receiving port, and the capacitive component in the circuit unit and the inductive component in the signal transmitting circuit form a resonator structure configured to operate in a frequency resonance mode during the reception mode. | 03-13-2014 |
20140128009 | INTEGRATED TRANSMITTER AND RECEIVER FRONT END MODULE, TRANSCEIVER, AND RELATED METHOD - A front end module includes a transmitter path network coupled to an antenna and a transmitter, and includes a first selectable matching network. The front end module further includes a receiver path network coupled to the antenna and a receiver. The receiver path network is a second selectable matching network. | 05-08-2014 |
20140170995 | CONCURRENT HYBRID MATCHING NETWORK - A concurrent hybrid matching network is disclosed. In an exemplary embodiment, an apparatus includes a phase shifting coupler having a first terminal connected to an antenna, a second terminal connected to a receive signal path, and third terminal connected to a transmit signal path. The apparatus also includes at least one switch to configured to enable one of the receive signal path and the transmit signal path to communicate with the antenna. | 06-19-2014 |
20140179241 | CONCURRENT MATCHING NETWORK USING TRANSMISSION LINES FOR LOW LOSS - A concurrent matching network using transmission lines for low loss is disclosed. In an exemplary embodiment, an apparatus includes a first ¼ wavelength transmission line configured to couple a first signal path to a common node that is coupled to one or more additional signal paths. The apparatus also includes at least one switch configured to disable the first signal path causing the first ¼ wavelength transmission line to provide a first off-state impedance at the common node. | 06-26-2014 |
20140199951 | TRANSCEIVER AND RELATED SWITCHING METHOD APPLIED THEREIN - A transceiver includes: a power amplifying circuit arranged to generate differential output signals during a transmitting mode of the transceiver; a balance-unbalance circuit arranged to convert the differential output signals into a single-ended output signal; a switchable matching circuit arranged to receive the single-ended output signal on a signal port of the transceiver during the transmitting mode, and to convert a single-ended receiving signal on the signal port into a single-ended input signal during a receiving mode of the transceiver; and a low-noise amplifying circuit arranged to convert the single-ended input signal into a low-noise input signal during the receiving mode. The power amplifying circuit, the Balun, the switchable matching circuit, and the low-noise amplifying circuit are configured as a single chip. | 07-17-2014 |
20140206301 | TRANSCEIVER WITH AN INTEGRATED RX/TX CONFIGURABLE PASSIVE NETWORK - Disclosed is an apparatus including a transmitter amplifier having an output terminal communicatively coupled to a transmission line to output a first set of radio frequency (RF) signals to an antenna. The apparatus may include a receiver amplifier having an input terminal communicatively coupled to the transmission line to receive a second set of RF signals from the antenna. The apparatus may include a passive network coupled between the transmitter amplifier and the receiver amplifier, the passive network being configurable to cancel either a first reactance of a parasitic capacitance of the transmitter amplifier or second reactance of a parasitic capacitance of the receiver amplifier. The apparatus may also include a switch coupled between the input terminal and a voltage reference to selectively configure the passive network to cancel either the first reactance or the second reactance. Other embodiments may be described and claimed. | 07-24-2014 |
20140213199 | Automatic Self-Powered Antenna Switch - An antenna switch is provided, comprising: an antenna cable connector that connects to a radio RF output port that both receives an RF signal at a receive frequency, and transmits an RF signal at a transmit frequency that differs from the receive frequency; an RF switch having a common contact that is switchable between a receive antenna contact and a transmit antenna contact; a level comparator comprising an input connected to the antenna cable that: when a voltage at the input is below a predefined threshold value, causes the RF switch to contact the receive antenna; and when the voltage at the input is above a predefined threshold value, causes the RF switch to contact the transmit antenna. | 07-31-2014 |
20140213200 | Transceiver with Board-Level Configuration of On-Chip or External Transmit/Receive Switch - A transceiver includes an integrated circuit that enables board-level configuration of an on-chip or external transmit/receive switch. The transceiver uses a high-Q matching network, at least part of which is external, that improves receiver performance; increases transmit power while allowing for configuration of the same chip to use an internal TR switch, or external TR switch by changing connection at the board level rather than the chip level. | 07-31-2014 |
20140308906 | HIGH FREQUENCY CIRCUIT MODULE - A high frequency circuit module is provided with: a multilayer circuit substrate; a first high frequency switch that switches connection of an antenna; a transmission filter; and reception filters. Either the transmission filter or the reception filters, or both, and the first high frequency switch are embedded in the multilayer circuit substrate, and ground conductors are formed in a conductive layer facing embedded electronic components. | 10-16-2014 |
20140335800 | SEMICONDUCTOR DEVICE, ANTENNA SWITCH CIRCUIT, AND RADIO COMMUNICATION APPARATUS - A semiconductor device includes: a laminated body including a channel layer that is configured of a compound semiconductor; and at least one gate electrode that is provided on a top surface side of the laminated body, wherein the laminated body includes a first low-resistance region that is provided on the top surface side of the laminated body, the first low-resistance region facing the at least one gate electrode, and a second low-resistance region that is provided externally of the first low resistance region on the top surface side of the laminated body, the second low-resistance region being continuous with the first low-resistance region. | 11-13-2014 |
20140335801 | TECHNIQUE TO REDUCE THE THIRD HARMONIC OF AN ON-STATE RF SWITCH - RF switching circuitry includes an RF switch coupled between an input node and an output node. Distortion compensation circuitry is coupled in parallel with the RF switch between the input node and the output node. The RF switch is configured to selectively pass an RF signal from the input node to the output node based on a first switching control signal. The distortion compensation circuitry is configured to boost a portion of the RF signal that is being compressed by the RF switch when the amplitude of the RF signal is above a predetermined threshold by selectively injecting current into one of the input node or the output node. Boosting a portion of the RF signal that is being compressed by the RF switch allows a signal passing through the RF switch to remain substantially linear, thereby improving the performance of the RF switching circuitry. | 11-13-2014 |
20140335802 | SECOND ORDER HARMONIC CANCELLATION FOR RADIO FREQUENCY FRONT-END SWITCHES - A radio frequency switch circuit with improved harmonic suppression and low insertion loss has an antenna port and a plurality of signal ports. A plurality of transistor switch circuits, are connected to a respective one of the plurality of signal ports and to the antenna port. Each of the transistor switch circuits has a transistor, which in an off state, together with a harmonic suppression capacitor and a parallel inductor both connected thereto, define a tank circuit that suppresses RF signals applied to the corresponding transistor switch circuit from a different one of the transistor switch circuits. The harmonic suppression capacitor is tuned to distribute large signal voltage swings in the RF signal amongst parasitic diodes of the transistor. | 11-13-2014 |
20150099476 | MULTI PERSONAL AREA NETWORK (PAN) RADIO WITH SHARED TRANSMITTER - A multi-personal area network (PAN) transceiver includes two or more receiver modules for simultaneously monitoring traffic broadcast on different PANs, but a shared transmitter that switches between the different PANs as needed for transmitting data. The shared transmitter reduces the circuitry that would otherwise be required to transmit on multiple PANs while the multiple receiver modules preserve the ability to monitor traffic on multiple networks. | 04-09-2015 |
20150118977 | RADIO FREQUENCY FRONT END MODULE WITH HIGH BAND SELECTIVITY - A radio frequency front end module is provided for a high power capability and a high signal band selectivity. The front end module includes an external filter and an integrated circuit coupled with the external filter via two external filter leads. The integrated circuit includes a transmit-receive switch, a power amplifier and a low noise amplifier. The transmit-receive switch alternates between coupling an antenna port to a transmit port and coupling the antenna port to a receive port. The power amplifier amplifies a modulated radio frequency signal. The low noise amplifier amplifies a received radio frequency signal when the antenna port is coupled to the receive port. The external filter can be replaced to adapt to various requirements of signal frequency bands, without the need of modifying the layout of the integrated circuit. | 04-30-2015 |
20150118978 | TRANSMIT AND RECEIVE RF MULTIPLEXER - A transmit and receive RF multiplexer, which includes a first hybrid RF transmit coupler, a first hybrid RF receive coupler, a hybrid RF antenna coupler, and RF bandpass filter and inversion circuitry, is disclosed. The first hybrid RF transmit coupler has a first main transmit port and a pair of transmit ports having a first in-phase transmit port and a first quadrature-phase transmit port. The first hybrid RF receive coupler has a first main receive port and a pair of receive ports having a first in-phase receive port and a first quadrature-phase receive port. The hybrid RF antenna coupler has a main coupler port and a pair of coupler ports having an in-phase coupler port and a quadrature-phase coupler port, such that the main coupler port is coupled to a primary RF antenna. | 04-30-2015 |
20150147981 | SWITCHING DEVICE HAVING A DISCHARGE CIRCUIT FOR IMPROVED INTERMODULATION DISTORTION PERFORMANCE - Radio-frequency (RF) switch circuits are disclosed providing improved switching performance. An RF switch system includes at least one field-effect transistor (FET) disposed between a first node and a second node, each having a respective source, drain, gate, and body. The system includes a coupling circuit including a first path and a second path, the first path being between the respective source or the respective drain and the respective gate of the at least one FET, the second path being between the respective source or the respective drain and the respective body of the at least one FET. The coupling circuit may be configured to allow discharge of interface charge from either or both of the coupled gate and body. | 05-28-2015 |
20150303983 | VECTOR MODULATOR AND TRANSCEIVER INCLUDING THE SAME - A vector modulator of a transceiver may be provided that includes: a variable resistor having one end to which an input signal is transmitted; a variable capacitor which is connected in parallel to the variable resistor and has one end to which the input signal is transmitted; and a summing circuit which sums a signal of the other end of the variable resistor and a signal of the other of the variable capacitor. | 10-22-2015 |
20150318890 | HIGH-FREQUENCY SWITCH MODULE - A high-frequency switch module includes a switch IC, a phase adjustment circuit, and a filter circuit. The phase adjustment circuit, which includes an inductor and capacitors, includes a π-type circuit in which the inductor is connected in series between an individual terminal and the filter circuit. The filter circuit is an LC parallel resonant circuit including a filter inductor and a filter capacitor. A distortion second harmonic signal from the individual terminal of the switch IC is reflected by the filter circuit through the phase adjustment circuit and returns to the switch IC through the phase adjustment circuit. This distortion second harmonic signal, whose phase is adjusted by the phase adjustment circuit, is cancelled out by a distortion second harmonic signal output to a common terminal of the switch IC. | 11-05-2015 |
20150326254 | WIRELESS DEVICE WITH ADAPTIVELY-TUNABLE ELECTRICALLY-SMALL ANTENNAS - A communication device includes a transmitter (TX), a receiver (RX), one or more adaptively-tunable Electrically-Small Antennas (ESAs), and a control unit. The transmitter is configured to produce a TX signal for transmission on a TX frequency band. The receiver is configured to process an RX signal received on an RX frequency band. The adaptively-tunable ESAs are configured to transmit the TX signal on the TX frequency band and to receive the RX signal on the RX frequency band. The control unit is configured to adaptively tune respective responses of the one or more ESAs in the TX or RX frequency band. | 11-12-2015 |
20150333791 | RF TRANSFORMER BASED TX/RX INTEGRATED RF SWITCH - The present invention is a novel and useful RF transformer based transmit/receive (TX/RX) integrated RF switch. In one embodiment of the invention, the TX/RX RF switch circuit is based on the use of an RF transformer which functions as (1) the PA output transformer during TX mode and (2) as a series inductance in an LNA matching network during receive mode. Thus, the RF transformer plays a dual function or role. Antenna diversity is achieved by having multiple antennas each having an associated antenna switch connected to the output transformer. The TX/RX switch of the invention reduces the number of switches required for antenna diversity to a minimum and minimizes RF losses in the system. The TX/RX switch is suitable for use with modern wireless communication standards such as DECT, 802.11 WLAN, Bluetooth, ZigBee, etc. The configuration of the TX/RX circuit permits the use of common, relatively low cost semiconductor fabrication techniques such as standard CMOS processes. | 11-19-2015 |
20150365088 | RADIO FREQUENCY DEVICES HAVING REDUCED INTERMODULATION DISTORTION - Radio-frequency (RF) devices are disclosed providing reduced intermodulation distortion. Disclosed RF and semiconductor devices can include a semiconductor substrate, a switch formed on the semiconductor substrate having a stack of field-effect transistors (FETs) connected in series, and a capacitor formed on the semiconductor substrate and connected in series with the switch, the capacitor configured to inhibit a low-frequency blocker signal from mixing with a fundamental-frequency signal in the switch. | 12-17-2015 |
20160006475 | RADIO FREQUENCY TRANCEIVER FRONT-END DEVICE - In an RF transceiver front-end device that operates in a receiving mode, a first transformer circuit generates, based on an external RF signal received by an antenna, a first induction signal that passes through a switch unit, and that is amplified by a low noise amplifier circuit and then demodulated by a demodulation circuit to thereby generate a reception signal. When the RF transceiver front-end device is in a transmitting mode, a power amplifier circuit generates, based on a modulated signal generated by a modulation circuit through modulation of an external transmission signal, an amplified output. A second transformer circuit then generates, based on the amplified output, a second induction signal that is thus radiated by the antenna. | 01-07-2016 |
20160020818 | RADIO FREQUENCY FRONT END SYSTEM WITH AN INTEGRATED TRANSMIT/RECEIVE SWITCH - A Radio Frequency (RF) front end system and method are disclosed. The RF front end system comprises an antenna, a matching network coupled to the antenna, a power amplifier (PA) coupled to the matching network via a port on a transmit path, a low noise amplifier (LNA) coupled to the matching network via the port on a receive path and at least one transmit/receive switch (T/R SW) coupled between the port and at least one of the PA and LNA. | 01-21-2016 |
20160028432 | COMPLEMENTARY METAL OXIDE SEMICONDUCTOR DIFFERENTIAL ANTENNA TRANSMIT-RECEIVE SWITCHES WITH POWER COMBINING CIRCUITRY FOR ORTHOGONAL FREQUENCY-DIVISION MULTIPLEXING SYSTEMS - A radio frequency (RF) transmit-receive switch has an antenna port, first and second transmit differential ports and first and second receive differential ports. Transmit transistor switches are connected to the transmit differential ports. Primary and secondary windings of a transmit coupled inductor transformer are connected to the transmit transistor switches. Receive transistor switches are connected to the receive differential ports. Primary and secondary windings of a receive coupled inductor transformer are connected to the receive transistor switches. A first balun inductive winding is connected to the antenna port, and a second balun inductive winding is connected to the transistor switches. | 01-28-2016 |
20160043746 | MEASURING TRANSDUCER SUPPLY UNIT, SYSTEM FOR USE IN AUTOMATION TECHNOLOGY, AND METHOD FOR OPERATING SUCH A SYSTEM - A measuring transducer supply unit for use in automation technology, which makes the connection of at least one field unit to a superordinate unit by means of a two-wire line possible, wherein the measuring transducer supply unit comprises at least a switch, a radio module, and a circuitry. The radio module can be activated or de-activated by means of the switch, and the circuitry realizes the conversion between signals of the two-wire line and signals of the radio module such that the at least one field unit connected to the measuring transducer supply unit via the two-wire line can be operated by wireless communications connection by means of the radio module. | 02-11-2016 |
20160056978 | SYSTEMS AND METHODS TO SWITCH RADIO FREQUENCY SIGNALS FOR GREATER ISOLATION - In semiconductor switches, the isolation can be limited by the capacitive coupling between the switch input and the switch output. Ultra-high isolation can be achieved by adding a coupled transmission line to the semiconductor switch. The coupled transmission line introduces inductive coupling, which cancels at least a part of the capacitive coupling between the switch input and the switch output. | 02-25-2016 |
20160065206 | SWITCH STAND-BY MODE ISOLATION IMPROVEMENT - Systems, apparatuses and methods are disclosed providing a semiconductor die comprising a semiconductor substrate and a radio-frequency (RF) switch including one or more series field-effect transistors (FETs) and one or more shunt FETs, each of the one or more series FETs and one or more shunt FETs having a respective gate node, the RF switch being configured to receive an RF signal from a power amplifier module and provide the RF signal to an antenna. The semiconductor die may further comprise an internal regulator voltage source configured to provide an internal regulator voltage when the RF switch is in a stand-by mode and shunt arm control circuitry configured to provide the internal regulator voltage to the gate nodes of the one or more shunt FETs when the RF switch is in the stand-by mode. | 03-03-2016 |
20160087038 | SEMICONDUCTOR DEVICE, ANTENNA SWITCH CIRCUIT, AND RADIO COMMUNICATION APPARATUS - A semiconductor device includes: a laminated body including a channel layer that is configured of a compound semiconductor; and at least one gate electrode that is provided on a top surface side of the laminated body, wherein the laminated body includes a first low-resistance region that is provided on the top surface side of the laminated body, the first low-resistance region facing the at least one gate electrode, and a second low-resistance region that is provided externally of the first low resistance region on the top surface side of the laminated body, the second low-resistance region being continuous with the first low-resistance region. | 03-24-2016 |
20160127005 | SIGNAL TRANSCEIVER - A signal transceiver is provided. The signal transceiver includes: signal convert circuit adapted to convert single-ended signals into differential signals; first power amplifier; receiving amplifier; impedance convert circuit; first capacitive circuit; second capacitive circuit; and first switch circuit; wherein output terminals of the signal convert circuit are connected with output terminals of the first power amplifier and first set of terminals of the first capacitive circuit; second set of terminals of the first capacitive circuit is connected with first set of terminals of the impedance convert circuit; second set of terminals of the impedance convert circuit is connected with input terminals of the receiving amplifier and first set of terminals of the second capacitive circuit; second set of terminals of the second capacitive circuit is connected with first set of terminals of the first switch circuit; and second set of terminals of the first switch circuit is connected to ground. | 05-05-2016 |
20160127009 | PRE-DISTORTION OF RECEIVE SIGNAL FOR INTERFERENCE MITIGATION IN BROADBAND TRANSCEIVERS - A broadband transceiver includes an input to receive an RF signal, an output to output an RF transmit signal, a receiver section coupled to the input, and a transmitter section coupled to the output. A processor coupled to the receiver section and the transmitter section determines and generates an inverse waveform that will result in attenuation of undesired portions of a received RF signal when summed with the received signal, including optionally at one or more of an RF stage and an IF stage. A summing junction coupled between the processor and receiver section sums the inverse waveform with the received signal. | 05-05-2016 |
20160134325 | A DUPLEX UNIT - A duplex unit allowing simultaneous transmission and reception of microwave signals on at least partly overlapping frequency bands, comprising an interference canceller unit and a control unit, the duplex unit being arranged to receive a transmit signal and to output a first part of the transmit signal at an antenna port, the duplex unit further being arranged to receive a receive signal comprising a payload signal at the antenna port, and to output a combination of the receive signal and a filtered transmit signal as an interference suppressed receive signal of the duplex unit. | 05-12-2016 |
20160148732 | APPARATUS AND METHODS RELATED TO FERRITE BASED CIRCULATORS - Apparatus and methods related to ferrite based circulators are disclosed. A ferrite disk used in a circulator can be configured to reduce intermodulation distortion when routing radio-frequency signals having closely spaced frequencies. Such a reduction in intermodulation distortion can be achieved by adjusting magnetization at the edge portion of the ferrite disk. By way of an example, a ferrite disk with a reduced saturation magnetization (4PiMs) edge portion can reduce intermodulation distortion. Example configurations with such a reduced 4PiMs edge portions are disclosed. | 05-26-2016 |
20160191106 | FRONT END CIRCUIT - A front end circuit includes a switch including two ports disposed at a primary side of the switch and ports disposed at a secondary side of the switch. The front end circuit also includes a filter unit forming return paths using at least a portion of the ports disposed on the secondary side of the switch. The filter unit includes a filter positioned on each of the return paths. | 06-30-2016 |
20170237425 | SWITCHING CIRCUIT FOR RADIO FREQUENCY ISOLATION IN A PORTABLE TRANSCEIVER | 08-17-2017 |
20170237462 | Integrated RF Front End with Stacked Transistor Switch | 08-17-2017 |