Class / Patent application number | Description | Number of patent applications / Date published |
343861000 | Adjustable | 83 |
20080252548 | ANTENNA STRUCTURE FOR A NOTEBOOK - An antenna structure for a notebook comprising a main body of an antenna and a printed circuit board which is provided on the main body of the antenna and is electrically connected; and the printed circuit board is laid out thereon at least with a radio frequency matched line, the radio frequency matched line can be adjusted to get a desired bandwidth. | 10-16-2008 |
20080252549 | ANTENNA DEVICE - An antenna device for television broadcast reception includes an antenna element including a base member and a radiating conductor, and a matching circuit. A feed signal is supplied to the antenna element via the matching circuit. The matching circuit includes a variable capacitance element (varactor diode), a first inductance element connected in parallel to the variable capacitance element, and a second inductance element connected in series with the variable capacitance element. A capacitance value of the variable capacitance element is changed to change a resonant frequency of the antenna element. The variable capacitance element and the first inductance element form a parallel circuit, and a resonance point of the parallel circuit is set to a frequency lower than the resonant frequency of the antenna element. As the resonant frequency increases, the resonance point is shifted to a high-frequency side. | 10-16-2008 |
20090002255 | MATCHING DEVICE AND ANTENNA MATCHING CIRCUIT - A battery portion (BAT) or another type of voltage shift portion is provided for shifting a control voltage (V | 01-01-2009 |
20090121963 | TUNING MATCHING CIRCUITS FOR TRANSMITTER AND RECEIVER BANDS AS A FUNCTION OF TRANSMITTER METRICS - A tunable matching circuit is adjusted primarily based on transmitter oriented metrics and is then applied to attain a desired tuning for transmitter and receiver operation. In a TDM system, this is accomplished by identifying an optimal tuning for the transmitter and then applying an empirically derived adjustment to the tuning circuit in receiver mode. In an FDM system, this is accomplished by identifying a target operation that is a compromise between transmitter performance and receiver performance, and then adjusting the tuning circuit as a function of transmitter metrics and the current tuning values to achieve the desired compromised performance. | 05-14-2009 |
20090153431 | Continuously Tunable Impedance Matching Network Using BST Capacitor - An impedance matching circuit employs a variable capacitor, such as a BST capacitor. The bias voltage to the variable capacitor may be adjusted in order to match several different frequencies used with the antenna to the signal source. | 06-18-2009 |
20100019983 | DETECTION OF THE VALUE OF AN IMPEDANCE OF A RADIOFREQUENCY SYSTEM - A method and a device for determining the amplitude and the phase of an impedance connected on a transmission line, including a bidirectional coupler having a first line interposed on the transmission line and having a second line providing at its respective ends two measurement signals, and a balun having its respective differential-mode inputs receiving data representative of the measurement signals. | 01-28-2010 |
20100182216 | Adaptive Impedance Matching Circuit and Method for Matching for Duplex Operation Standards - A method for the impedance matching of front end circuits to antennas in mutually different transmission and reception frequency ranges is specified. A suitable matching circuit is furthermore specified. The impedance matching in a transmission frequency range is determined such that an excessively poor impedance matching in a reception frequency range is prevented in this case. | 07-22-2010 |
20100201598 | ANTENNA SYSTEM AND METHOD FOR OPERATING AN ANTENNA SYSTEM - An antenna system ( | 08-12-2010 |
20100245205 | WIDEBAND ANTENNA FOR PORTABLE COMPUTERS - A wideband antenna, for use in portable computers incorporating at least one wireless communication device, with improved radiated antenna efficiency across a broad range of operating frequency bands with minimal additional physical size or cost, is described. In an exemplary embodiment, the wideband antenna is defined by at least a first and second housing, where a first metal structure in at least a first one of the at least a first and second housings is commonly connected to at least two antenna RF feed ports at a boundary of the at least a first and second housing. In a further exemplary embodiment, the device is a portable computer, and the first housing is an upper display housing, the second housing includes a wireless communication device with at least two RF signal paths to at least two antenna RF feed ports, and the second housing further includes a second metal structure commonly connected to at least two antenna RF feed ports of the wideband antenna. | 09-30-2010 |
20100302123 | Wireless Communication Device Antenna With Tuning Elements - The present disclosure relates to wireless communication device antennas with tuning elements. | 12-02-2010 |
20100309087 | Chip antenna device - A chip antenna device includes a single or multi-layer dielectric substrate, a radiator body, one or a plurality of first coupling electrodes formed on the radiator body, and a ground radiator formed on the upper or lower surface or inter-layer in another end of the substrate. It is designed by using loops and coupling concepts. The chip antenna device does not require large areas and clear space but has high radiation efficiency. It adjusts the impedance matching and operation frequency by changing the signal feed position, so that low frequency operation can be achieved without increasing the area of said antenna meeting the requirements of compact size for electronic products. | 12-09-2010 |
20110102291 | Method and System for Software Defined Antenna Control - Methods and systems for reducing AM/PM and AM/AM distortion are disclosed and may comprise selectively coupling and impedance matching one of a plurality of tunable antennas to a single programmable output stage comprising a single power amplifier in a transmitter. A programmable matching circuit comprising adjustable inductance and capacitance may be used to impedance match the antenna to the output stage. The selected tunable antenna may be coupled to the output stage utilizing a programmable switch array, which may comprise at least one transistor integrated on an integrated circuit including the output stage, for example. The tunable antennas may be designed to operate in different frequency bands and to be tuned within one or more frequency bands. The programmable matching circuit may be integrated on the chip or external to the chip. The matching circuit capacitance may be integrated on-chip, and the inductance may be located off-chip. | 05-05-2011 |
20110122044 | ELECTRONIC APPARATUS - According to one embodiment, an electronic apparatus includes an antenna, a switch circuit and a control circuit. The antenna is configured to have a first resonance frequency band and a second resonance frequency band. The switch circuit is connected between a feeder line and the antenna and configured to switch a resonance frequency band of the antenna from the first resonance frequency band to the second resonance frequency band in accordance with a control signal. The control circuit is configured to resonate with a transmission signal of the second resonance frequency band, which flows from a wireless communication module through the feeder line, and to generate the control signal by using energy which is obtained by the resonance with the transmission signal. | 05-26-2011 |
20110163935 | Dynamic Impedance Matching Network and Method for Matching an Impedance Between a Source and a Load - An impedance matching network includes an impedance matching circuit for dynamically matching an impedance between a source and a load. Matching is done by varying the real part and the imaginary part of the impedance of the impedance matching circuit independently. | 07-07-2011 |
20110254753 | ANTENNA DEVICE AND RADIO COMMUNICATION APPARATUS - An antenna device that includes an antenna having a single feed and a shunt circuit. The shunt circuit includes a first shunt matching circuit causing impedance, viewed from a main path connecting the antenna and a radio frequency circuit, to be substantially infinite with respect to all frequency ranges handled by the antenna, and a second shunt matching circuit providing a predetermined impedance characteristic with respect to a first subset of the frequency ranges handled by the antenna. Each of the first and second shunt matching circuits are selectively connected to the main path, and a selection controller of the antenna device controls selection of which of the first and second shunt matching circuits are connected to the main path. | 10-20-2011 |
20110291912 | LOOP ANTENNA - A loop antenna is provided. The loop antenna includes: a substrate; an outer pattern including at least one loop on a surface of the substrate; and an inner pattern in an inner region of the at least one loop of the outer pattern, an end of the inner pattern being connected to an end of the outer pattern, wherein the inner pattern is configured so that an electric current flows in the inner pattern in a direction opposite to a direction in which the electric current flows in the outer pattern. Accordingly, an H-Field characteristic of the loop antenna can be enhanced, thereby allowing the loop antenna to have a decreased size and an improved performance. | 12-01-2011 |
20110298685 | Impedance Adjustment Circuit for Adjusting Planar Antennas - An impedance matching circuit for matching planar antennas includes a signal path with a signal path input and a signal path output. A first capacitive element with variable capacitance is connected between the signal path input and signal path output. A second capacitive element with variable capacitance is connected between the signal path and ground. A first inductive element is connected between the signal path input and ground. A second inductive element is connected between the signal path output and ground. An antenna line with an impedance between 30 and 60 ohm is connected to the signal path output. | 12-08-2011 |
20120075160 | ANTENNA MODULE - An antenna module includes an antenna, a tunable matching circuit, a power detector and a control unit. The antenna comprises a feeding point. The tunable matching circuit, electrically connected between the antenna and the power detector and configured to provide a loading impedance, comprises a plurality of tunable impedance elements connected to each other and electrically connected to the feeding point as well. The power detector is electrically connected between the tunable matching circuit and a power amplifier and configured to detect a power indicator. The control unit, electrically connected to the tunable matching circuit and the power detector, is configured to read the power indicator and RSSI to generate a control signal for the tunable matching circuit, which consistently changes the loading impedance to achieve impedance matching. | 03-29-2012 |
20120092228 | VARIABLE CAPACITANCE DEVICE, ANTENNA MODULE, AND COMMUNICATION APPARATUS - A variable capacitance device includes a fixing member, a fixed electrode having a first end side fixed by the fixing member, an actuator element having a first end side fixed by the fixing member directly or indirectly, a movable electrode provided to connect to the actuator element directly or indirectly and disposed to approximately face the fixed electrode, and a driving section deforming a second end side of the actuator element, to change a distance between the fixed electrode and the movable electrode. | 04-19-2012 |
20120154245 | ANTENNA APPARATUS - This disclosure provides an antenna apparatus in which stable antenna characteristics are maintained by detecting surrounding conditions that affect the antenna characteristics and appropriately compensating the antenna characteristics. More specifically, when surrounding condition such as a human body (e.g., a palm or fingers) approaches and enters an electric field of a pseudo dipole formed by an antenna element electrode, a stray capacitance is sensed and stable antenna characteristics are maintained by appropriately controlling an antenna matching circuit to compensate for a change in the antenna characteristics due to the approach of the surrounding condition. | 06-21-2012 |
20120200472 | METHOD OF CONNECTING ONE OR MORE CONTACTLESS COMPONENTS TO A SINGLE ANTENNA, AND CORRESPONDING SYSTEM - A first component (CMP | 08-09-2012 |
20120268342 | ELECTRONIC APPARATUS - According to one embodiment, an electronic apparatus includes an antenna, a switch circuit and a control circuit. The antenna is configured to have a first resonance frequency band and a second resonance frequency band. The switch circuit is connected between a feeder line and the antenna and configured to switch a resonance frequency band of the antenna from the first resonance frequency band to the second resonance frequency band in accordance with a control signal. The control circuit is configured to resonate with a transmission signal of the second resonance frequency band, which flows from a wireless communication module through the feeder line, and to generate the control signal by using energy which is obtained by the resonance with the transmission signal. | 10-25-2012 |
20130002511 | ANTENNA DEVICE AND WIRELESS COMMUNICATION APPARATUS - An antenna device of an embodiment includes: an antenna having a feeding point and an end portion apart from the feeding point, the end portion being an open end; a variable impedance matching circuit connected to the antenna at the feeding point; a probe placed in such a position that the distance from the end portion to a tip of the probe is equal to or shorter than one eighth of the wavelength corresponding to the maximum radio frequency used in the antenna device; and a controller that is connected to the probe, and controls the variable impedance matching circuit, based on an electrical signal measured with the probe. | 01-03-2013 |
20130021220 | System and Method for Impedance Matching in Antennas - A system for use with a transmitter and an antenna includes a radio frequency power detection portion, a tunable matching network, and a phase lock loop. The tunable matching network has a modifiable impedance to account for impedance mismatch between the transmitter and the antenna. The phase lock loop tunes the tunable matching network to modify the modifiable impedance. | 01-24-2013 |
20130038502 | CONTROLLER FOR A RADIO CIRCUIT - The invention relates to a controller for a radio circuit. The radio circuit comprises at least one variable impedance element coupled between an antenna and a received signal quality indicator generator. The controller is configured to receive a received signal quality indicator from the received signal quality indicator generator and to provide a control signal to the at least one variable impedance element. The control signal comprises a command to modify the impedance of the variable impedance element in accordance with the value of the received signal quality indicator. | 02-14-2013 |
20130063323 | MOBILE WIRELESS COMMUNICATIONS DEVICE INCLUDING ACOUSTIC COUPLING BASED IMPEDANCE ADJUSTMENT AND RELATED METHODS - A mobile wireless communications device may include a portable housing, and an antenna carried by the portable housing. The mobile wireless communications device may further include wireless communications circuitry carried by the portable housing and an adjustable impedance matching network coupled between the wireless communications circuitry and the antenna. An audio input transducer and an audio output transducer may be carried by the portable housing. The mobile wireless communications device may further include a controller carried by the portable housing and configured to determine an acoustic coupling between the audio input transducer and the audio output transducer. The controller may further be configured to adjust the adjustable impedance matching network based upon the determined acoustic coupling. | 03-14-2013 |
20130063324 | ADJUSTABLE INTEGRATED CIRCUIT ANTENNA STRUCTURE - A Radio Frequency (RF) device includes an adjustable antenna structure for coupling to a transmit/receive coupling module. The adjustable antenna structure includes an antenna and a plurality of transmission line elements. At least one of the plurality of transmission line circuit elements is selected, based on a transmission line characteristic signal, to form a transmission line circuit that is coupled to the antenna. | 03-14-2013 |
20130088405 | APPARATUS AND METHOD FOR MATCHING ANTENNA IN WIRELESS TERMINAL - Disclosed are apparatus and method for matching an antenna in a wireless terminal, which are tailored for easy control of impedance matching. A controller is configured to generate state information corresponding to states of the wireless terminal, and providing the state information to a Field Programmable Gate Array (FPGA) unit. The FPGA unit outputs an optimal Tunable Matching Network (TMN) adjustment value corresponding to the state information of the wireless terminal State information may include operating bands/protocols and modes discerning particular environmental conditions impacting electric fields, such as a hand-held condition. | 04-11-2013 |
20130099993 | ELECTRONIC DEVICE FOR PROCESSING RADIO FREQUENCY SIGNALS AND MATCHING CIRCUIT FOR PROVIDING VARIABLE IMPEDANCE - An electronic device includes an antenna, an RF circuit, and a matching circuit. The matching circuit is configured to provide variable impedance between the antenna and the RF circuit, wherein the matching circuit includes a first element having a first terminal and a second terminal, and wherein the first terminal is coupled to the antenna; a second element having a third terminal connected to the second terminal of the first element and a fourth terminal coupled to the RF circuit; a first tuning cell connected to the second terminal of the first element and the third terminal of the second element, and comprising a first tuning element, a second tuning element and a first control element, wherein the first control element determines whether to make a first node connected between the first and second tuning elements couple to a voltage level. | 04-25-2013 |
20130147680 | ANTENNA IMPEDANCE MATCHING METHOD - The present invention discloses an antenna impedance matching method which is used for adjusting an impedance of an antenna to match an impedance of a radio frequency (RF) integrated circuit (IC). The method comprises the following steps of: (1) providing an antenna matching IC; (2) obtaining a used frequency band of the RF IC, so as to obtain a frequency band signal; (3) adjusting an impedance of the matching IC according to the band signal, so that the antenna achieves impedance matching. In summary, the present invention uses the matching IC to instead of a traditional matching circuit, and according to the band signal of the RF IC to adjust and match the impedance of the IC, so as to change the resonance and impedance of the antenna, and to achieve the impedance matching. | 06-13-2013 |
20130147681 | METHODS FOR TUNING AN ADAPTIVE IMPEDANCE MATCHING NETWORK WITH A LOOK-UP TABLE - Methods for generating a look-up table relating a plurality of complex reflection coefficients to a plurality of matched states for a tunable matching network. Typical steps include measuring a plurality of complex reflection coefficients resulting from a plurality of impedance loads while the tunable matching network is in a predetermined state, determining a plurality of matched states for the plurality of impedance loads, with a matched state determined for each of the plurality of impedance loads and providing the determined matched states as a look-up table. A further step is interpolating the measured complex reflection coefficients and the determined matching states into a set of complex reflection coefficients with predetermined step sizes. | 06-13-2013 |
20130154897 | Methods and Apparatus for Controlling Tunable Antenna Systems - An electronic device may include an adjustable power supply, at least one antenna, and associated antenna tuning circuitry. The antenna tuning circuitry may be an integral part of the antenna and may include a control circuit and at least one tunable element. The tunable element may include radio-frequency switches, continuously/semi-continuously adjustable components such as tunable resistors, inductors, and capacitors, and other load circuits that provide desired impedance characteristics. The power supply may provide power supply voltage signals to the antenna tuning circuitry via inductive coupling. The power supply voltage signals may be modulated according to a predetermined lookup table during device startup so that the control circuit is configured to generate desired control signals. These control signals adjust the tunable element so that the antenna can support wireless operation in desired frequency bands. | 06-20-2013 |
20130187828 | TUNABLE MATCHING NETWORK FOR ANTENNA SYSTEMS - A communication system is provided, including an antenna, a matching network coupled to the antenna, a controller configured to control the matching network, and a look-up table coupled to the controller. The look-up table includes characterization data according to frequency bands and conditions. The controller is configured to refer to the look-up table to determine optimum impedance for a frequency band selected under a condition detected during a time interval, and adjust the matching network to provide the optimum impedance. | 07-25-2013 |
20130187829 | HIGH SPEED TUNABLE MATCHING NETWORK FOR ANTENNA SYSTEMS - A communication system is provided, including an antenna, a matching network coupled to the antenna, a controller configured to host an algorithm for controlling the matching network, and a look-up table coupled to the controller. The look-up table includes characterization data according to frequency bands and conditions. The controller is configured to refer to the look-up table to determine optimum impedance for a frequency band selected under a condition detected during a time interval, and adjust the matching network to provide the optimum impedance. Part or all of the sections related to the tunable matching scheme can be integrated on a chip. | 07-25-2013 |
20130222205 | METHOD AND APPARATUS FOR TUNING ANTENNAS IN A COMMUNICATION DEVICE - A system that incorporates teachings of the present disclosure may include, for example, a matching network for a communication device having first and second antennas, where the matching network includes a first variable component connectable and a detector. The first variable component can be connectable along a first path between the first antenna and a front end module of the communication device, where the first antenna is configured for transmit and receive operation. The detector can be connectable along a second path between the second antenna and the front end module of the communication device, where the detector obtains an RF voltage associated with the second path, where the second antenna is configured for a diversity receive operation, and where the first variable component is adjusted based on the detected RF voltage to tune the matching network. Additional embodiments are disclosed. | 08-29-2013 |
20130241795 | ANTENNA APPARATUS FOR MOBILE TERMINAL - A mobile terminal with an antenna apparatus is provided. The mobile terminal in one embodiment includes an antenna radiator disposed at a first end of the mobile terminal; at least one antenna modifying element disposed at a second, opposing end of the mobile terminal; and a coupling unit for fastening the first and second ends and electrically connecting the at least one antenna modifying element with the antenna device when the first and second ends are fastened. In another embodiment, a deformation detector detects at least one deformation of the mobile terminal, an antenna matching unit is electrically connectable to the first antenna radiator; and a controller is coupled to the deformation detector, for controlling an electrical connection between the antenna matching unit and the first antenna radiator when the at least one deformation is detected. The antenna matching unit may include a second antenna radiator. | 09-19-2013 |
20130241796 | ANTENNA DEVICE - An antenna device can detect the surrounding environment and appropriately corrected and maintain stable antenna characteristics. The antenna device includes at least first and second antenna element electrodes, an antenna matching circuit provided along a wireless communication signal path for the first antenna element electrode, a capacitance detection circuit connected to the second antenna element electrode and operable to detect stray capacitance of the antenna element electrode using a sensing signal. A matching control circuit controls the antenna matching circuit in accordance with an output signal of the capacitance detection circuit. | 09-19-2013 |
20130257677 | HYBRID VARIABLE CAPACITOR, RF APPARATUS, METHOD FOR MANUFACTURING HYBRID VARIABLE CAPACITOR AND METHOD FOR TUNING VARIABLE CAPACITOR - Disclosed herein are a hybrid variable capacitor, an RF apparatus, a method for manufacturing a hybrid variable capacitor, and a method for tuning a variable capacitor. The hybrid variable capacitor used in a tunable matching network includes: a metal-insulator-metal (MIM) cap array including one or more MIM capacitors and having varied capacitance equivalent to values of a lower-bit region among digital values corresponding to capacitance to be tuned; and a MOS varactor connected in parallel to the MIM cap array and having varied capacitance equivalent to values of an upper-bit region among the digital values. | 10-03-2013 |
20130271342 | DEVICE AND METHOD FOR ANTENNA IMPEDANCE MATCHING - The disclosure provides a device and a method for antenna impedance matching. The device comprises an application detection module, configured to detect a current state of an antenna of a terminal, and output a matching adjustment signal according to the state; an adaptive control module, configured to perform control over a process of matching adjustment in response to the matching adjustment signal; and a matching adjustable module, configured to, under control of the adaptive control module, perform matching adjustment on impedance of the antenna through an impedance matching network corresponding to the matching adjustment signal. Through the technical solution provided by the disclosure, the problem of single impedance matching mode in the prior art is solved, and further, the effect that differential matching can be performed for various application states of the terminal is achieved. | 10-17-2013 |
20130335291 | DUAL/WIDEBAND TERMINATION FOR HYBRID TRANSFORMER - A wireless device is described. The wireless device includes an antenna. The wireless device also includes a hybrid transformer. The wireless device further includes a frequency matching termination port. The frequency matching termination port provides impedance matching with the antenna at multiple frequencies. The frequency matching termination port may include multiple resistors, inductors and capacitors that can be switched in/out. | 12-19-2013 |
20140002324 | ANTENNA MATCHING CIRCUIT CONTROL DEVICE | 01-02-2014 |
20140009362 | MOBILE COMMUNICATION DEVICE AND IMPEDANCE MATCHING METHOD THEREOF - A mobile communication device and an impedance matching method thereof are provided. The mobile communication device includes an antenna, a power amplifier, a tunable matching circuit, a power detection circuit and a controller. The tunable matching circuit determines an output impedance encountered by a radio frequency (RF) signal transmitted by the power amplifier to the antenna when the RF signal enters the tunable matching circuit. The power detection circuit detects a forward power of the RF signal entering the antenna and a reflected power of the antenna. The controller tunes the tunable matching circuit according to a frequency range currently used by the mobile communication device, the forward power and the reflected power to steer the output impedance toward a corresponding load-pull impedance that the power amplifier has in the frequency range. | 01-09-2014 |
20140022143 | Method of Checking the Matching of an Antenna Connected to a NFC Component and Corresponding NFC Component - An NFC component includes a first interface that can be used in reader mode and is configured to be connected to an antenna via an impedance matching external circuit. A second interface can be used in card mode and in reader mode and is configured to be connected to the antenna and to the first interface via the impedance matching external circuit. An internal module includes a first detection circuit configured to deliver a first detection signal that represents the phase antenna matching quality when the impedance matching external circuit and the antenna are indeed connected between the first interface and the second interface. The internal module is further configured to deliver a check signal from at least the first detection signal. | 01-23-2014 |
20140028521 | TUNER TOPOLOGY FOR WIDE BANDWIDTH - Adjustable impedance tuning circuitry includes a first impedance matching terminal, a second impedance matching terminal, and a plurality of passive components adapted to match the impedance of the first impedance matching terminal and the second impedance matching terminal. The plurality of passive components includes one or more tunable components adapted to adjust the impedance of the adjustable impedance tuning circuitry to maintain an impedance match between the first impedance matching terminal and the second impedance matching terminal over a variety of operating conditions. Each of the one or more tunable components includes one or more switches adapted to selectively alter the impedance of the tunable component. The one or more switches are integrated onto a single semiconductor die in order to facilitate the performance of the adjustable impedance tuning circuitry over a wide bandwidth. | 01-30-2014 |
20140049442 | TUNABLE IMPEDANCE MATCHING CIRCUIT - A tunable impedance matching circuit is provided for matching a signal source to an impedance of an antenna. The tunable impedance matching circuit includes two terminals, a series path, and two shunt paths. The first terminal is coupled to the signal source, and the second terminal is coupled to the antenna. The series path is coupled between the first terminal and the second terminal and includes a first tunable capacitor and at least one tunable inductor. One of the two shunt paths is coupled between the first terminal and a ground end, and the other one of the two shunt paths is coupled between the second terminal and the ground end. Each of the shunt paths includes a second tunable capacitor. | 02-20-2014 |
20140098000 | METHOD AND APPARATUS FOR TUNABLE ANTENNA AND GROUND PLANE FOR HANDSET APPLICATIONS - An embodiment is directed to a device comprising an antenna, a chassis configured to be electrically coupled to the antenna and comprising a slot loaded with at least one tunable component, wherein: the slot is aligned along a longitudinal edge of the chassis, the slot is formed in an area of the chassis based on an identification of currents in the area, and the antenna and chassis are electrically connected at a location based on the area. | 04-10-2014 |
20140104132 | Impedance Matching Network with Improved Quality Factor and Method for Matching an Impedance - An impedance matching network comprises a first and a second signal terminal and a reference potential terminal. The network further comprises a first shunt branch between the first signal terminal and the reference potential terminal, the first shunt branch comprising a variable inductive element and a first capacitive element. The impedance matching network also comprises a second shunt branch between the second signal terminal and the reference potential terminal and comprising a second capacitive element. A series branch between the first signal terminal and the second signal terminal comprises a third capacitive element. Optionally, the first, second, and/or third capacitive element may be implemented as a variable capacitive element. The variable capacitive element comprises a plurality of transistors, wherein a combination of off-capacitances C | 04-17-2014 |
20140118216 | ADJUSTABLE INTEGRATED CIRCUIT ANTENNA STRUCTURE - An antenna structure of a Radio Frequency (RF) device includes an antenna and a transmission line circuit coupled to the antenna. The transmission line circuit includes a plurality of transmission line circuit elements and a transmission line coupling circuit that couples at least one of the transmission line circuit elements together to form the transmission line circuit based on a transmission line characteristic signal. | 05-01-2014 |
20140145901 | INTERCHANGEABLE PRINTED CIRCUIT BOARD AMONG VARIOUS TYPES OF PLATFORMS BY ADJUSTING AN IMPEDANCE VALUE - Examples disclose a printed circuit board including an antenna and a matching circuit to match an impedance of the antenna. Further, the examples of the printed circuit board provide the printed circuit board is interchangeable among various types of platforms by adjusting the impedance value of the matching circuit without replacing an electrical component of the matching circuit. | 05-29-2014 |
20140145902 | ADAPTIVE IMPEDANCE MATCHING APPARATUS, SYSTEM AND METHOD WITH IMPROVED DYNAMIC RANGE - An embodiment of the present invention provides an apparatus, comprising' an RF matching network connected to at least one RF input port and at least one RF output port and 5 including one or more voltage or current controlled variable reactive elements; a voltage detector connected to the at least one RF output port via a variable voltage divider to determine the voltage at the at least one RF output port and provide voltage information to a controller that controls a bias driving circuit which provides voltage or current bias to the RF matching network; a variable voltage divider connected to the voltage detector and implemented using a 10 multi-pole RF switch to select one of a plurality of different resistance ratios to improve the dynamic range of the apparatus; and wherein the RF matching network is adapted to maximize RF power transferred from the at least one RF input port to the at least one RF output port by varying the voltage or current to the voltage or current controlled variable reactive elements to maximize the RF voltage at the at least one RF output port. | 05-29-2014 |
20140159987 | RADIO FREQUENCY DEVICE WITH COMPENSATION OF PERMITTIVITY DISPERSION OF THE SUBSTRATE AND ADJUSTMENT METHOD - The invention relates to a device for transmitting and/or receiving radio frequency signals comprising at least one antenna and/or at least one filter realised in printed technology on a dielectric substrate. According to the invention, this device is equipped with means for compensating the permittivity dispersions of the substrate. For this purpose, the device comprises a circuit for measuring the dielectric permittivity of the substrate able to deliver a measured permittivity value and adjustment means able to adjust the impedance of the antenna and/or the frequency response of said filter according to said measured permittivity value. | 06-12-2014 |
20140168029 | PRINTED ANTENNA MODULE APPLIED TO THE RF DETECTION PROCEDURE - A printed antenna module applied to an RF detection procedure is provided. The module comprises a substrate, a ground terminal part, a feeding part, an antenna body, and a second connecting end. The substrate comprises a first surface and a second surface. The ground terminal part and the feeding part are disposed on the first surface. A first end of the feeding part corresponds to the ground terminal part. The antenna body, disposed on the first surface relative to the ground terminal part, comprises a first extending part. One end of the first extending part forms a first connecting end. The second connecting end is disposed on the first surface. The shapes of the first and the second connecting ends correspond to each other. A second end of the feeding part is connected to the second connecting end. An RF detection point is formed on the second surface. | 06-19-2014 |
20140176388 | TUNABLE IMPEDANCE NETWORK - A tunable impedance network and a method for tuning the tunable impedance network are disclosed. In one aspect, the tunable impedance network comprises a plurality of transformers connected in series. Each transformer has a primary winding and a secondary winding. The transformers have a voltage transformation ratio of N:1 with N>1. An impedance structure, acting as a resonant circuit together with the inductance of the secondary winding, is connected at the secondary winding of each transformer. A control circuit or processor is configured to tune the imaginary part of at least one of the impedance structures so as to change its resonance frequency to mimic a reference impedance. The control circuit is further configured to tune the real part of at least one of the impedance structures so as to change its Q-factor to mimic the reference impedance. | 06-26-2014 |
20140210685 | ELECTRONIC DEVICE AND ANTENNA CONTROL METHOD THEREOF - An electronic device including a first body and a second body is disclosed. The first body includes a first system circuit board, a first grounding element, and a primary antenna. The first grounding element is disposed on the first system circuit board. The primary antenna is disposed on the first system circuit board and electrically connected to the first grounding element. The primary antenna transmits/receives at least one radio frequency (RF) signal. The second body includes a second system circuit board and a clearance area. The clearance area is on the second system circuit board, and no circuit exists in the clearance area. When the first body and the second body are stacked by parallelizing the first system circuit board and the second system circuit board, the clearance area is corresponding to the primary antenna. | 07-31-2014 |
20140210686 | DYNAMIC REAL-TIME CALIBRATION FOR ANTENNA MATCHING IN A RADIO FREQUENCY RECEIVER SYSTEM - Real-time calibration of a tunable matching network that matches the dynamic impedance of an antenna in a radio frequency receiver system. The radio frequency receiver system includes two non-linear equations that may be solved to determine the reflection coefficient of the antenna. The tunable matching network is repeatedly perturbed and the power received by the antenna is measured after each perturbation at the same node in the matching network. The measured power values are used by an optimizer in converging to a solution that provides the reflection coefficient of the antenna. The reflection coefficient of the antenna may be used to determine the input impedance of the antenna. The elements of the matching circuit are then adjusted to match the input impedance of the antenna. | 07-31-2014 |
20140218260 | FLEXIBLE PIFA ANTENNA WITH TUNABLE COUPLING ELEMENT - A modified PIFA antenna is designed for wireless local area network (WLAN) applications. The modified PIFA antenna is configured to resist detuning effects caused by use of various cable lengths and is adapted for use in the 2.4 GHz operation band. A slot extends between the ground and feed portions of the antenna for slightly increasing frequency bandwidth of the antenna. | 08-07-2014 |
20140266965 | Antenna Tuner Control System Using State Tables - An antenna tuner control system includes an RF path, a lookup table and a state table analysis component. The RF path is configured to generate an RF signal. The lookup table has a state table that correlates antenna states with impedance values. The state table analysis component is configured to generate a tuner control signal from the RF signal using the lookup table. | 09-18-2014 |
20140327594 | APPARATUS AND METHOD FOR MATCHING IMPEDANCE - An apparatus for matching impedance for use in a wireless communication is provided. The apparatus includes a forward path carrying a transmission signal to an antenna. The apparatus further comprises a quadrature feedback path configured to extract and feed back in-phase and quadrature phase components from each of a forward signal being transmitted toward the antenna and a reverse signal reflected from the antenna. A tunable matching network (TMN) is coupled to the forward path, having a plurality of tunable elements for matching an internal impedance to an impedance of the antenna. A controller is configured to calculate TMN input impedance's amplitude and phase based on the in-phase and quadrature phase components from each of the forward signal and the reverse signal. | 11-06-2014 |
20140340279 | ADAPTIVE ANTENNA FEEDING AND METHOD FOR OPTIMIZING THE DESIGN THEREOF - Disclosed is an antenna feeding system and method to optimize the design of the feeding system to feed an antenna made of a resistive sheet. The system and method are operative to design a topology of the antenna feeding system to adapt to a topology of the resistive sheet antenna to mitigate the adverse effects caused by the inherent losses of resistive sheets while operating as antennas. The system is designed to reduce a convergence of radiofrequency currents that may create a localized high density current concentration, such as “hot spots” and “pinch points,” on the resistive sheet, by a sufficient extent so as to prevent power losses that substantially decrease the radiation efficiency of the antenna as compared with feeding systems designed using traditional design techniques. | 11-20-2014 |
20140361948 | ANTENNA SYSTEM - Discussed herein is an antenna system that comprises a feed element and a radiating element that are formed on a dielectric substrate positioned above a circuit board which includes a feed circuit and a ground layer. Specifically, the feed element is disposed within an outer periphery defined by the radiating element. A capacitive coupling is formed between the feed element and the radiating element. With the aforesaid configuration, the antenna system is less affected by the circuit board and interference from other elements that are mounted on the circuit board. Further, manufacturing costs are reduced as compared to the case where the feed element and the radiating element are respectively formed on a front and rear surface of a resin layer. | 12-11-2014 |
20140375523 | ANTENNA IMPEDANCE MATCHING APPARATUS, SEMICONDUCTOR CHIP, AND METHOD - The present invention provides an antenna impedance matching apparatus, semiconductor chip, and method. The apparatus includes: a semiconductor chip, including multiple adjustable capacitors and multiple switches; and at least one impedance component, located outside the semiconductor chip, where the semiconductor chip is coupled to the at least one impedance component through multiple terminals and coupled to an input terminal and an output terminal of the antenna impedance matching apparatus, the input terminal and the output terminal of the antenna impedance matching apparatus are respectively coupled to a radio frequency circuit and an antenna, the multiple switches are configured to, under control of a control signal, switch a connection between the multiple adjustable capacitors and the at least one impedance component, and values of the multiple adjustable capacitors are adjusted by an adjustment signal, so as to tune impedance matching of the antenna. | 12-25-2014 |
20150022422 | MOBILE DEVICE AND MULTI-BAND ANTENNA STRUCTURE THEREIN - A mobile device includes a dielectric substrate, a ground plane, an RF (Radio Frequency) module, an antenna structure, a bypass inductor, matching circuits, and a switch circuit. The antenna structure includes a first radiation element and a second radiation element. The first end of the first radiation element is connected to the RF module, and the second end of the first radiation element is open. The second radiation element is separate from the first radiation element. The first end of the second radiation element is open and adjacent to the first radiation element, and the second end of the second radiation element is connected through the bypass inductor to the ground plane. The switch circuit selects one of the matching circuits according to a control signal. The second end of the second radiation element is further connected through the selected matching circuit to the ground plane. | 01-22-2015 |
20150042537 | TUNABLE MICROWAVE DEVICES WITH AUTO-ADJUSTING MATCHING CIRCUIT - An embodiment of the present disclosure provides an impedance matching circuit including a matching network. The matching network includes a first port and a second port, and one or more variable reactance components. The one or more variable reactance components are operable to receive one or more variable voltage signals to cause the one or more variable reactance components to change an impedance of the matching network. At least one of the one or more variable reactance components includes a first conductor coupled to one of the first port or the second port of the matching network, a second conductor, and a tunable material positioned between the first conductor and the second conductor. Additionally, at least one of the first conductor and the second conductor are adapted to receive the one or more variable voltage signals to cause the change in the impedance of the matching network. Additional embodiments are disclosed. | 02-12-2015 |
20150048993 | RECONFIGURABLE RESONANT AERIAL WITH AN IMPEDANCE CORRECTOR - The invention relates to aerial technology and can be used as a compact reconfigurable aerial for long-wave, medium-wave and short-wave communications. An aerial with an impedance corrector, consisting of an inductance coils, comprises a flat or three-dimensional vibrator. The vibrator is arranged in the magnetic field of the impedance corrector, which is in the form of a transformer. The transformer is arranged on an open core of a magnetic conductor. The vibrator is electrically connected to a secondary winding of the transformer. The transformer has a variable coefficient of transformation. The magnetic conductor is manufactured from a mixture of particles of ferro-magnetic material and a non-magnetic binder. The technical result is an increase in the maximum power of the resonant aerial and the possibility of reconfiguring the working frequency thereof within a wide range of radio waves and, as a consequence, extending the functional possibilities of using a transceiver. | 02-19-2015 |
20150054709 | SYSTEMS AND METHODS FOR RECONFIGURABLE FILTENNA - Embodiments relate to systems and methods for a frequency reconfigurable filtenna system. Implementations incorporate a reconfigurable band-pass filter within the feeding line of an antenna structure. The combination of the filter and the antenna may be referred to as a “filtenna”. Implementations integrate both the band-pass filter and the antenna within the same substrate, permitting easier, more efficient and more compact integration in the transceiver hardware. Moreover, by using this configuration, the biasing of the switching elements are not present in the radiating plane of the antenna. This reduces the negative effect of the biasing lines on the antenna radiation performance, as we!! as provides a tunable filtered antenna radiation characteristic. | 02-26-2015 |
20150061960 | ANTENNA STRUCTURE AND WIRELESS COMMUNICATION DEVICE EMPLOYING SAME - An antenna structure includes a monopole antenna, a short parasitic antenna and an impedance matching circuit. The monopole antenna includes a first radiating body, a second radiating body and a feeding portion coupled to the first radiating body and the second radiating body. The first radiating body configured to excite a low-frequency resonating mode; the second radiating body configured to excite a first high-frequency resonating mode. The short parasitic antenna includes a parasitic body spaced apart from the second radiating body and a grounding portion coupled to the parasitic body. The short parasitic antenna configured to excite a second high-frequency resonating mode, and resonate with the second radiating body to excite a third high-frequency resonating mode. The impedance matching circuit includes a variable capacitor configured to regulate operating frequency band of the low-frequency resonating mode. | 03-05-2015 |
20150077307 | ANTENNA STRUCTURE AND WIRELESS COMMUNICATION DEVICE EMPLOYING SAME - An antenna structure includes a feeding portion, a grounding portion, a first radiating body, a second radiating body, a first coupling portion and a second coupling portion. The first radiating body is electronically coupled to the grounding portion and the feeding portion. The second radiating body is positioned apart from the first radiation body. The first coupling portion is electronically coupled between the first radiating body and the second radiating body. The second coupling portion faces the first coupling portion and is electronically coupled between the first and second radiating bodies. The first and second radiating bodies, and the first and second coupling portions cooperatively define a loop antenna. | 03-19-2015 |
20150123870 | METHODS FOR TUNING AN ADAPTIVE IMPEDANCE MATCHING NETWORK WITH A LOOK-UP TABLE - Methods for generating a look-up table relating a plurality of complex reflection coefficients to a plurality of matched states for a tunable matching network. Typical steps include measuring a plurality of complex reflection coefficients resulting from a plurality of impedance loads while the tunable matching network is in a predetermined state, determining a plurality of matched states for the plurality of impedance loads, with a matched state determined for each of the plurality of impedance loads and providing the determined matched states as a look-up table. A further step is interpolating the measured complex reflection coefficients and the determined matching states into a set of complex reflection coefficients with predetermined step sizes. | 05-07-2015 |
20150311881 | ANTENNA DEVICE - A stray capacitance is generated between an antenna element and a ground electrode. A capacitance detection circuit detects the stray capacitance. An antenna matching circuit, is provided along a wireless communication signal path, which is a transmission path between the antenna element and a feeder circuit. A feedback control circuit transmits a control signal to the variable matching circuit on the basis of a detection result of the capacitance detection circuit in accordance with the stray capacitance. The capacitance detection circuit includes a constant current source and a timing circuit to measure the time taken to charge the antenna from the constant current source and for the voltage to reach a predetermined voltage. | 10-29-2015 |
20150333401 | BULK ACOUSTIC WAVE RESONATOR TUNER CIRCUITS - Techniques and configurations are disclosed for bulk acoustic wave resonator (BAWR) tuner circuits and their use in integrated circuit (IC) packages and mobile communication devices for radio frequency (RF) communication. In some embodiments, a mobile communication device may include an antenna; a transmitter circuit having an output port, a tuner circuit having one or more BAWRs, an antenna port coupled to the antenna, a transmitter port coupled to the output port of the transmitter circuit, and a control port; and a control circuit, coupled to the control port, configured to adjust an impedance of the tuner circuit, via adjustment of a BAWR or another component of the tuner circuit, based at least in part on an impedance of the antenna. Other embodiments may be described and/or claimed. | 11-19-2015 |
20150341012 | METHOD AND APPARATUS FOR ADAPTIVE IMPEDANCE MATCHING - A system that incorporates teachings of the present disclosure may include, for example, an adaptive impedance matching network having an RF matching network coupled to at least one RF input port and at least one RF output port and comprising one or more controllable variable reactive elements. The RF matching network can be adapted to reduce a level of reflected power transferred from said at least one input port by varying signals applied to said controllable variable reactive elements. The one or more controllable variable reactive elements can be coupled to a circuit adapted to map one or more control signals that are output from a controller to a signal range that is compatible with said one or more controllable variable reactive elements. Additional embodiments are disclosed. | 11-26-2015 |
20150365065 | CONTROL DEVICE, AUTOMATIC MATCHING METHOD FOR ANTENNAS, AND WIRELESS DEVICE - A control device includes a power detector that detects a power of a signal transmitted by an antenna, a transmitting power of the signal fluctuating due to transmit power control; and a controller that adjusts a setting value of a variable matching circuit in such a way that the power increases based on a result of comparison of a reference value with a detected power of the power detector, that detects fluctuation in the transmitting power based on a temporal change in the detected power, and that corrects the reference value based on the fluctuation in the transmitting power. | 12-17-2015 |
20150380812 | HAND GRIP SENSOR FOR EXTERNAL CHASSIS ANTENNA - A method and system for detecting whether the position of a user's hand gripping a mobile communication device chassis affects an external antenna is provided. A sectioned metal band about a periphery of a mobile communication device has a radiating antenna in at least one metal section. The radiating antenna section is bounded on both sides by electrically floating metal sections. Each of the electrically floating metal sections is bounded on the side distal from the antenna section by a ground metal section. Each metal section separated from an adjacent metal section by an insulating gap. Embodiments measure a differential capacitance between the antenna section and the floating metal section and measure a single and capacitance between the floating metal section and the grounded section to determine whether a user's hand is bridging one or more of the insulating gaps. | 12-31-2015 |
20160036126 | MATCHING CIRCUIT FOR ANTENNA AND ASSOCIATED METHOD - A matching circuit for an antenna of whatever type, includes a ground circuit and a feed circuit. The ground circuit connects a ground terminal of the antenna to a ground voltage, and provides an inductive impedance between the ground terminal and the ground voltage. The feed circuit connects a feed signal to a feed terminal of the antenna. The feed circuit is capable of switching between a first mode and a second mode for respectively providing a first equivalent impedance and a second equivalent impedance between the feed signal and the feed terminal. An associated method is also disclosed. | 02-04-2016 |
20160099700 | CMOS Tuner And Related Tuning Algorithm For A Passive Adaptive Antenna Matching Network Suitable For Use With Agile RF Transceivers - A novel and useful adaptive antenna tuner and associated calibration mechanism for passive adaptive antenna matching networks. The tuner is suitable for use with cellular antennas and in one embodiment uses MEMS based tunable devices. The tuner contains voltage and current sensors inserted before the antenna matching network. The sensed complex impedance generates one or more update control signals for the tuning algorithm which drives the MEMS-based tunable devices. | 04-07-2016 |
20160112028 | AUTOMATIC IMPEDANCE ADJUSTMENT - An apparatus and method are described for automatically matching the impedance of an antenna. An impedance matching network includes at least one variable impedance element and has an input for receiving a drive signal and an output connectable to an antenna. The impedance matching network includes a shunt capacitor in series between the input and output. A phase measuring measures the phase difference between the voltage and the current of the drive signal using the voltage drop across the shunt capacitor and outputs a measured phase signal. A voltage measuring circuit measures the magnitude of the voltage of the drive signal and the voltage drop across the shunt capacitor and outputs a measured drive voltage signal and shunt capacitor voltage signal. An automatic impedance matching circuit can output a control signal to adjust the impedance of the variable impedance element and determines the impedance of the impedance matching network from the measured phase, drive voltage and shunt capacitor voltages automatically to reduce the difference between the determined impedance of the impedance matching network and the impedance of the antenna. | 04-21-2016 |
20160126618 | INTEGRATED CIRCUIT, WIRELESS COMMUNICATION UNIT, AND METHOD FOR ANTENNA MATCHING - A radio frequency integrated circuit for a wireless device to an antenna, wherein the antenna is coupled to the radio frequency circuit via at least one off-chip inductor that forms a first portion of an antenna matching circuit, wherein the integrated circuit includes: a first port coupleable to the radio frequency circuit; a second port coupleable to the antenna, and a second portion of the antenna matching circuit located between the first port and second port and coupled in parallel with the at least one off-chip inductor. The second portion of the antenna matching circuit includes: at least one on-chip inductor; and at least one radio frequency switch coupled in series with the at least one on-chip inductor and arranged to selectively introduce the at least one on-chip inductor into the antenna matching circuit. | 05-05-2016 |
20160134017 | MULTIBAND ANTENNA AND WIRELESS COMMUNICATION DEVICE - A multiband antenna includes main antenna, a switch circuit, and a parasitic antenna. The main antenna includes a radiating portion, a feeding portion, a grounding portion, and an extending portion coupled to the feeding portion and the grounding portion. The radiating portion is configured to generate a low frequency resonate mode. The switch circuit is configured to regulate an impedance matching characteristic of the multiband antenna, thereby regulating an operating frequency of the low frequency resonate mode. The parasitic antenna is positioned apart from and electromagnetically coupled to the main antenna, and configured to generate a high frequency resonate mode. | 05-12-2016 |
20160134254 | PARAMETER SCANNED TUNABLE ANTENNA - Generally discussed herein are techniques, software, apparatuses, and systems configured for tuning an antenna. In one or more embodiments, a method can include sending, by processing circuitry, one or more signals to an antenna tuner to sweep the tuner through a plurality of tuner states, determining a plurality of power values, each power value corresponding to a signal received from an antenna and each power value corresponding to the tuner being in a state of the plurality of tuner states, and sending one or more signals to the tuner to set the tuner to a tuner state of the plurality of tuner states, the tuner state determined using the determined powers. | 05-12-2016 |
20160142035 | AUTOMATIC IMPEDANCE MATCHING METHOD AND MODULE, PARTICULARLY FOR A RADIO-FREQUENCY TRANSMISSION OR RECEPTION CHAIN - An automatic impedance matching method for a radio-frequency chain comprises: an impedance matching network having an input and an output, a first radio-frequency device connected to the input and a second radio-frequency device connected to the output, the impedance matching network exhibiting a reconfigurable topology and comprising a plurality of reactive elements, at least one of which exhibits a variable reactance, the method comprising the choice of the configuration of the impedance matching network allowing the implementation of impedance matching while minimizing losses. An automatic impedance matching module for implementing the method is provided. Radio-frequency transmission and reception chains comprising a module are also provided. | 05-19-2016 |
20160182096 | APPARATUS FOR PROVIDING A CONTROL SIGNAL FOR A VARIABLE IMPEDANCE MATCHING CIRCUIT AND A METHOD THEREOF | 06-23-2016 |
20160190682 | Antenna System and Mobile Terminal - An antenna system and a mobile terminal are disclosed. The antenna system includes an antenna radiator and an adjustable matching circuit connected between the antenna radiator and a radio frequency interface. The adjustable matching circuit adjusts the resistance between the antenna radiator and the radio frequency interface according to a plurality of frequency bands. The antenna radiator in the embodiments of the present disclosure is a metallic body of strip shape, which has a simple structure and is easy to implement and can be combined with the adjustable matching circuit to implement coverage of a larger range band width. | 06-30-2016 |
20160197412 | MULTI-ANTENNA ARRAY SYSTEM | 07-07-2016 |