With Distributed Parameter Coupling Patents (Class 455/80)
  • Patent number: 9768845
    Abstract: A method for detecting operation state of a mobile terminal to adaptively adjust antenna state, comprises: step 1, outputting a detecting result when the external object is detected to be in proximity to or contacting a predetermined location of the mobile terminal; step 2, acquiring the operation state of the mobile terminal based on the detecting result; step 3, adjusting the antenna state based on the operation state. The present invention also discloses a sensing system capable of determining the usage scenario of the mobile terminal used by users; by using a design of integrating a sensor unit to the complete device, it can correctly determine a present method and scenario of a hand-held mobile terminal being used by user, so that the adjustable antenna can make a selection for a present user scenario better, and improve the radio-frequency performance of the complete device and the user experience.
    Type: Grant
    Filed: November 30, 2015
    Date of Patent: September 19, 2017
    Assignee: Spreadtrum communications (Shanghai) Co., Ltd.
    Inventor: Mingbo Liu
  • Patent number: 9450455
    Abstract: A magnetic resonance power transmitter of a magnetic resonance wireless power transmission system includes a resonance coil, an alternating current power source configured to cause the resonance coil to generate an alternating current, and a frequency changer configured to change, based on communication data, a frequency of the alternating current that the alternating current power source causes the resonance coil to generate.
    Type: Grant
    Filed: May 2, 2012
    Date of Patent: September 20, 2016
    Assignee: FUJITSU LIMITED
    Inventor: Akiyoshi Uchida
  • Patent number: 9337539
    Abstract: Antenna structures and methods of operating the same of an electronic device are described. One apparatus includes an antenna element and three matching circuits coupled to the antenna element. The first RF module is operable to cause the antenna element to radiate or receive electromagnetic energy in a first frequency range. The second RF module is operable to cause the antenna element to radiate or receive electromagnetic energy in a second frequency range and a third frequency range. The impedance matching circuits are operable to match an impedance of the antenna element to an impedance of the first RF module to radiate or receive in the first frequency ranges and to match impedances of the antenna element to impedances of the second RF module to radiate or receive the electromagnetic energy in the second and third frequency ranges.
    Type: Grant
    Filed: December 5, 2014
    Date of Patent: May 10, 2016
    Assignee: Amazon Technologies, Inc.
    Inventors: Peruvemba Ranganathan Sai Ananthanarayanan, In Chul Hyun
  • Patent number: 9319208
    Abstract: Radio frequency (RF) duplexing devices and methods of operating the same are disclosed. In one embodiment, an RF duplexing device includes a transmission port, a receive port, a first duplexer, and a second duplexer. The first duplexer is coupled to the transmission port and the receive port, and is configured to provide a first phase shift from the transmission port to the receive port. The second duplexer is also coupled to the transmission port and the receive port. However, the second duplexer is configured to provide a second phase shift that is differential to the first phase shift from the transmission port to the receive port. By providing the second phase shift so that the second phase shift is differential to the first phase shift, the RF duplexing device can provide isolation through cancellation without needing to introduce significant insertion losses.
    Type: Grant
    Filed: December 26, 2012
    Date of Patent: April 19, 2016
    Assignee: RF Micro Devices, Inc.
    Inventor: Nadim Khlat
  • Patent number: 9281802
    Abstract: In accordance with an embodiment, a switchable capacitance circuit includes a plurality of capacitance-switch cells that each has a first semiconductor switching circuit and a capacitance circuit having a first terminal coupled to the first semiconductor switching circuit. A resistance of the first semiconductor switching circuit of a first switch-capacitance cell of the plurality of capacitance-switch cells is within a first tolerance of a resistance of the first semiconductor switching circuit of a second capacitance-switch cell of the plurality of capacitance-switch cells, and a capacitance of the capacitance circuit of the first capacitance-switch cell is within a second tolerance of a capacitance of the capacitance circuit of the second capacitance-switch cell.
    Type: Grant
    Filed: May 14, 2013
    Date of Patent: March 8, 2016
    Assignee: Infineon Technologies AG
    Inventor: Winfried Bakalski
  • Patent number: 9264014
    Abstract: A package structure includes a printed circuit board (PCB), a duplexer, a first dam, a second dam and a cover. The duplexer includes a transmission filter and a reception filter and is electrically connected with the PCB. The first dam is located on a surface of the PCB, and in cooperation with the PCB forms a first receptacle receiving the transmission filter. The second dam is located on the surface of the PCB, and in cooperation with the PCB forms a second receptacle receiving the reception filter. The cover is fixed with top parts of the first dam and the second dam to seal the transmission filter and the reception filter. A method of manufacturing plural such package structures is also provided.
    Type: Grant
    Filed: October 21, 2013
    Date of Patent: February 16, 2016
    Assignee: SHUNSIN TECHNOLOGY (ZHONG SHAN) LIMITED
    Inventor: Xiao-Ya Guo
  • Patent number: 9197187
    Abstract: A front-end circuit includes a diplexer and an impedance conversion circuit. The diplexer includes a feeding side common port through which a high-frequency signal in a high band and a high-frequency signal in a low band are input and output, a first port through which a high-frequency signal in a high band is input and output, and a second port through which a high-frequency signal in a low band is input and output, and demultiplexes or multiplexes the high-frequency signal in a low band and the high-frequency signal in a high band. The impedance conversion circuit is connected between the second port of the diplexer and an antenna port. The first port of the diplexer is directly connected to the antenna port through a transmission line.
    Type: Grant
    Filed: November 6, 2013
    Date of Patent: November 24, 2015
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Kenichi Ishizuka, Noboru Kato, Noriyuki Ueki
  • Patent number: 9148194
    Abstract: Radio-frequency (RF) switch circuits are disclosed providing improved switching performance. An RF switch system includes a switch having a stack of field-effect transistors (FETs) connected in series between first and second nodes. A capacitor connected in series with the switch is configured to inhibit a low-frequency blocker signal from mixing with a fundamental-frequency signal in the switch.
    Type: Grant
    Filed: July 6, 2013
    Date of Patent: September 29, 2015
    Inventors: Anuj Madan, Fikret Altunkilic, Guillaume Alexandre Blin
  • Patent number: 8989678
    Abstract: The transceiver has a transmitter, a receiver, and a three-port network. The transmitter is configured to transmit an outgoing RF signal. The receiver is configured to receive an incoming RF signal. The three-port network includes: a transmission line, configured to have a line length less than a quarter of a wavelength of the incoming RF signal; an antenna port, configured to connect to an antenna; a receiver port, configured to connect the receiver to the antenna port; and a transmitter port, configured to connect the transmitter to the antenna port and the receiver port through the transmission line.
    Type: Grant
    Filed: November 21, 2011
    Date of Patent: March 24, 2015
    Assignee: Mediatek Inc.
    Inventors: Sean Timothy Nicolson, Jing-Hong Conan Zhan
  • Patent number: 8965304
    Abstract: A multi-mode I/O circuit or cell (10) is provided for transmitting and receiving data between ICs, where each IC contains at least one of the I/O circuits. Each data link includes transmitter circuitry (12) and receiver circuitry (14). The transmitter circuitry sends data to a receiver circuitry in another IC, and the receiver circuitry receives data from a transmitter circuitry in another IC. The I/O circuit is constructed with CMOS-based transistors (e.g., CMOS or BiCMOS) that are selectively interconnected together by a plurality of switches to operate as two single-ended, current or voltage mode links, or as a single differential current or voltage mode link. In the preferred embodiment the transmitter circuitry sends data to the receiver circuitry in another IC over a first pair of adjacently disposed conductors, and the receiver circuitry receives data from the transmitter circuitry in another IC over a second pair of adjacently disposed conductors.
    Type: Grant
    Filed: February 23, 2009
    Date of Patent: February 24, 2015
    Assignee: Nokia Corporation
    Inventors: Antti Ruha, Tarmo Ruotsalainen, Jussi-Pekka Tervaluoto
  • Patent number: 8913626
    Abstract: Embodiments of methods, apparatuses, and systems for signal processing of multiple input signals to control peak amplitudes of a combined signal are disclosed. One method includes receiving a plurality of input signals, generating a combined signal, the combined signal comprising a plurality of sub-channels, wherein each sub-channel includes a representation of at least a portion of at least one of the plurality of input signals, and processing the representation of the least a portion of the at least one of the plurality of input signals of at least one of the sub-channels, to reduce a peak-to-average-power ratio (PAR) of the combined signal.
    Type: Grant
    Filed: May 15, 2012
    Date of Patent: December 16, 2014
    Assignee: Entropic Communications, Inc.
    Inventors: Moshe Malkin, Dimitry Taich, Jose Tellado
  • Patent number: 8907680
    Abstract: A voltage detector for detecting a voltage generated in a second resonant coil that is disposed to face a first resonant coil and that performs at least one of electric power transmission and electric power reception to and from the first resonant coil in a contactless manner by means of electromagnetic resonance includes: a first high-impedance element having one end connected to one end of the second resonant coil; a second high-impedance element having one end connected to the other end of the second resonant coil; a low-impedance element connected between the other end of the first high-impedance element and the other end of the second high-impedance element and having an impedance smaller than each of those of the first and second high-impedance elements; and an output terminal for outputting a signal associated with a voltage applied across the low-impedance element.
    Type: Grant
    Filed: May 27, 2010
    Date of Patent: December 9, 2014
    Assignees: Nippon Soken, Inc., Toyota Jidosha Kabushiki Kaisha
    Inventors: Hiroyuki Sakakibara, Shinji Ichikawa
  • Patent number: 8868006
    Abstract: A bi-directional signal interface includes a first waveguide that propagates a first traveling wave. The first waveguide has one end that is coupled to a RF input port that receives a RF transmission signal and another end that is coupled to a RF bi-directional port that receives a RF reception signal and that transmits the RF transmission signal. A second waveguide is positioned proximate to the first waveguide. The second waveguide has one end that is coupled to an output port that passes the received RF reception signal. A non-reciprocal coupler couples fields from the first waveguide to the second waveguide so that the RF reception signal from the bi-directional port couples from the first waveguide to the second waveguide in a substantially non-reciprocal manner and then passes through the output port, and the RF transmission signal from the RF input port passes through the first waveguide to the RF bi-directional port.
    Type: Grant
    Filed: May 22, 2009
    Date of Patent: October 21, 2014
    Assignee: Photonic Systems, Inc.
    Inventors: Charles Cox, Edward Ackerman
  • Patent number: 8855581
    Abstract: Aspects of a method and system for a transformer in an integrated circuit package are provided. In this regard, signals may be transmitted and/or received via an antenna communicatively coupled to a transformer embedded in multi-layer integrated circuit package. The windings ratio of the transformer may be configured based on an impedance of the antenna, an impedance of a transmitter coupled to the transformer, an impedance of an LNA coupled to the transformer, and/or a power level of the received and/or transmitted signals. The windings ratio may be configured via one or more switching elements which may be MEMS switches embedded in the multi-layer IC package. The transformer may comprise a plurality of loops fabricated on a corresponding plurality of metal layers in the multi-layer IC package, and the loops may be communicatively coupled with one or more vias. The multi-layer IC package may comprise ferromagnetic and/or ferromagnetic materials.
    Type: Grant
    Filed: September 12, 2012
    Date of Patent: October 7, 2014
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza Rofougaran, Maryam Rofougaran
  • Patent number: 8838026
    Abstract: Aspects disclosed herein relate to improving mechanisms for prompting a NFCC to update data exchange parameters for ISO-DEP communications between a DH and a remote NFC endpoint. In an example, with a NFC device a DH may be configured to receive an activation message from a NFCC that is using a Frame RF interface over NFC-B RF technology, determine that one or more data exchange parameters included in the activation message are different from one or more corresponding current relevant data exchange parameters that the NFCC is configured to implement, generate an RF parameter update command including the one or more data exchange parameters corresponding to the one or more current relevant data exchange parameters that are determined to be different, and send the generated RF parameter update command to the NFCC to prompt the NFCC to update the one or more corresponding current relevant data exchange parameters.
    Type: Grant
    Filed: September 25, 2012
    Date of Patent: September 16, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: John Hillan, Dubai Chingalande
  • Patent number: 8838045
    Abstract: Embodiments disclosed herein relate to programmable duplexers. The frequency pass band of the programmable duplexer is changed according to a selection of a channel-pair selection to control or maximize the transition band between the receiver path and the transmitter path. The programmable duplexer permits selections of desired pass bands without the need for multiple duplexer filters. As an additional advantage, the transmission band requirements become less sensitive to manufacturing tolerances and temperature variations.
    Type: Grant
    Filed: December 3, 2010
    Date of Patent: September 16, 2014
    Assignee: RF Micro Devices, Inc.
    Inventors: Joshua J. Caron, Julio Costa, Todd Gillenwater
  • Patent number: 8825010
    Abstract: A cell locking method for a mobile terminal and a mobile terminal capable of locking a cell are disclosed in the present invention. The method includes: the mobile terminal acquiring a system identification (SID), a network identification (NID), a base station identifier (BASE ID) and a pseudo-random number (PN) of a current cell; judging whether the SID, NID, BASE ID and PN are already stored in a database of the mobile terminal, if yes, then setting the mobile terminal to a normal status; judging whether the SID, the NID, and the PN are already stored in the database of the mobile terminal and the database is not full, or whether the BASE ID and PN are already stored in the database of the mobile terminal, if yes, then transferring to D; and D. writing the SID, NID, BASE ID and PN into the database of the mobile terminal.
    Type: Grant
    Filed: August 25, 2010
    Date of Patent: September 2, 2014
    Assignee: ZTE Corporation
    Inventors: Yanping Wang, Yanqiang Zuo, Hu Feng
  • Patent number: 8781395
    Abstract: In a near field communication partner device (1) intended for the contactless transmission of digital data to be transmitted having a transmission circuit (2), the transmission circuit (2) comprises a modulation circuit (17) for the amplitude modulation of a carrier signal (CS), which modulation circuit (17) comprises a circuit stage (20, 20?) for producing a plurality of different resistance values (RW1, RW1?) that act on a signal output (TX1, TX2), which resistance values (RW1, RW1?) can be transformed, by means of a signal processing circuit (3) arranged to transform resistance values that belongs to the communication partner device (1), into transformed resistance values (RW2, RW2?), which transformed resistance values (RW2, RW2?) are responsible for damping a transmission coil (7) of the communication partner device (1) when modulated low-level carrier signal sections are generated in a modulated carrier signal.
    Type: Grant
    Filed: June 21, 2013
    Date of Patent: July 15, 2014
    Assignee: NXP, B.V.
    Inventors: Peter Raggam, Erich Merlin
  • Patent number: 8750887
    Abstract: This invention includes signaling schemes for communicating the PDSCH muting configuration from the eNodeB to its UEs so that they can measure inter-cell CSI if configured. The base station transmits to each served user equipment a number signal indicating a number of allowed muting configurations, parameters for each allowed muting configuration and an enable/disable signal. Each served user equipment mutes or does not mute a physical downlink shared channel according to one of the allowed muting configurations and the state of a corresponding bit of the enable/disable signal.
    Type: Grant
    Filed: July 18, 2011
    Date of Patent: June 10, 2014
    Assignee: Texas Instruments Incorporated
    Inventors: Vikram Chandrasekhar, Runhua Chen
  • Patent number: 8744368
    Abstract: An apparatus and method are disclosed for providing test mode contact pad reconfigurations that expose individual internal functional modules or block groups in an integrated circuit for testing and for monitoring. A plurality of switches between each functional module switches between passing internal signals among the blocks and passing in/out signals external to the block when one or more contact pads are strapped to input a pre-determined value. Another set of switches between the functional modules and input/output contact pads switch between functional inputs to and from the functional modules and monitored signals or input/output test signals according to the selected mode of operation.
    Type: Grant
    Filed: December 30, 2011
    Date of Patent: June 3, 2014
    Assignee: Broadcom Corporation
    Inventors: Love Kothari, James Bennett, Zhongmin Zhang
  • Patent number: 8731490
    Abstract: In transmitter modules or power amplifier (PA) modules there is at least a possible path for a second and even a third harmonic of a low band to crossover unfiltered into the high band path and reach the antenna and hence cross band isolation is necessary. Forward isolation is necessary in order to limit the input crossing over the PAs into the antenna port. According to the methods and the circuits such cross band isolation and forward isolation is improved by detuning the filter and matching network at the output of the PA. The circuit comprises a trap at the harmonic frequencies of the low band thereby at least reducing the impacts of the cross band and forward isolation.
    Type: Grant
    Filed: October 2, 2012
    Date of Patent: May 20, 2014
    Assignee: RF Micro Devices (Cayman Islands), Ltd.
    Inventors: Malcolm Smith, Ying Shi
  • Patent number: 8670710
    Abstract: A communications device is disclosed that includes a united integrated circuit card (UICC) that provides a single wire protocol (SWP) current signal to a near field communications (NFC) device. The SWP current signal is filtered by a filter to remove noise from the SWP current signal. The filter is precharged by a reference voltage when the SWP current signal is in a low state and then filters the SWP current signal when the SWP current signal is in a high state. A switching network provides the filter with the reference voltage to precharge when the SWP is current signal is in the low state and then provides the filter with the SWP current signal to filter when the SWP current signal is in the high state.
    Type: Grant
    Filed: September 7, 2010
    Date of Patent: March 11, 2014
    Assignee: Broadcom Innovision Limited
    Inventor: David John Miles
  • Patent number: 8660502
    Abstract: 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.
    Type: Grant
    Filed: March 1, 2012
    Date of Patent: February 25, 2014
    Assignee: Hitachi Metals, Ltd.
    Inventors: Yusuke Wachi, Takashi Kawamoto, Yuta Sugiyama
  • Patent number: 8639195
    Abstract: The application relates to a method of enabling a high voltage input and/or output in a standard IC process, the high voltage being higher than specified for I/O transistors of the IC process. The application further relates to a transceiver IC and to an article of manufacture comprising a transceiver IC. The object of the present application is to provide an integrated circuit in a standard IC process that supports larger than specified input/output swings. The problem is solved in that providing that high voltage inputs or outputs of an IC implemented in said standard IC process comprise passive impedance transformation circuitry. This has the advantage of facilitating the use of a standard IC process for higher than specified voltage I/Os. The standard IC process is preferably a CMOS or BiCMOS semiconductor process. The invention may e.g. be used for low power communication devices, e.g. portable devices having a wireless interface, e.g. listening devices, e.g. hearing instruments.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: January 28, 2014
    Assignee: Oticon A/S
    Inventor: Kåre Tais Christensen
  • Patent number: 8611831
    Abstract: Numeric values “a” representing a respective order of transmission by a plurality of transmitting units, and a numeric value N representing the total number of transmitting units, are set for each of the transmitting units. At startup, a transmitting unit for which the value “a” representing the order of transmission of the unit has been set to 1 sets a trigger value to N and transmits information about the value “a” of the unit and detection information from a sensor, and, when the value N is detected from a received signal, transmits the value “a” of the unit and detection information. When a value of a?1 is detected from a received signal, the transmitting unit for which the value “a” representing the order of transmission of the unit has been set to other than 1 transmits the information of the value “a” of the unit and detection information.
    Type: Grant
    Filed: July 14, 2011
    Date of Patent: December 17, 2013
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Koji Nakatani, Shu Yamada, Sigeki Sakakibara, Michito Kaneko
  • Patent number: 8583043
    Abstract: A high-frequency device includes a wireless IC chip and a board which is coupled to the wireless IC chip and electrically connected to radiator plates, and an inductor and/or a capacitance are provided as a static electricity countermeasure element in the board. The inductor is connected in parallel between the wireless IC chip and the radiator plates, and its impedance at the frequency of static electricity is less than an impedance of the wireless IC chip.
    Type: Grant
    Filed: April 27, 2011
    Date of Patent: November 12, 2013
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Noboru Kato, Nobuo Ikemoto, Yuya Dokai, Koji Shiroki
  • Patent number: 8577305
    Abstract: Embodiments of the present invention may be used to generate oscillating signals. One embodiment of the present invention includes a circuit that receives a differential signal to be divided. The circuit converts the differential signal into an injection signal. The injection signal is coupled to an oscillator, and the oscillator generates an output signal having a frequency that is a fraction of the frequency of the differential input signal. In another embodiment, the present invention includes a MIMO wireless communication system. The MIMO system may use the divider circuit to divide a local oscillator signal with reduced common mode distortion.
    Type: Grant
    Filed: January 23, 2009
    Date of Patent: November 5, 2013
    Assignee: Marvell International Ltd.
    Inventors: Paolo Rossi, Sang Won Son
  • Patent number: 8515339
    Abstract: A method and apparatus that allows off-the-shelf equipment to be installed in a wide range of physical sites having a wide range of distances between a master system unit and each of a plurality of remote units. The master system unit has an integrated active combiner/splitter. The active combiner/splitter provides bi-directional gain or attenuation in each of the individual inputs/outputs to allow control of the signal level.
    Type: Grant
    Filed: May 10, 2002
    Date of Patent: August 20, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Eli Yona, Haim Weissman
  • Patent number: 8509689
    Abstract: A communication device for communicating with an external device using a human body as a signal transmission path, includes an electric field strength measuring unit configured to measure a noise level from a detected received electric field strength at the time of no signal after the received electric field strength is detected by the communication device when a transmission signal to be output to the external device is absent, a transmission output determination unit configured to determine an output level of the transmission signal to be transmitted to the external device on the basis of the measured noise level, and an output execution unit configured to output a transmission signal of the determined output level to the external device.
    Type: Grant
    Filed: July 22, 2010
    Date of Patent: August 13, 2013
    Assignee: Alps Electric Co., Ltd.
    Inventors: Masahito Nakamura, Daichi Inoue
  • Patent number: 8447246
    Abstract: In accordance with some embodiments of the present disclosure, a multi-band transmitter comprises a plurality of band paths with each band path configured for a different frequency range. Each band path comprises a modulator configured to modulate a data signal onto a carrier signal associated with the frequency range of the band path to generate a radio frequency (RF) signal associated with the band path and frequency range of the band path. Each band path also comprises a step-down balun that includes an input coil configured to receive the RF signal from the modulator. Each band path further comprises a tuner configured to tune the input coil to the frequency range of the band path. The tuner is also configured to compensate for off-state conduction of switches of the tuner to reduce non-linear tuning effects of the balun associated with the off-state conduction.
    Type: Grant
    Filed: August 11, 2011
    Date of Patent: May 21, 2013
    Assignee: Fujitsu Semiconductor Limited
    Inventors: Omid Oliaei, David Newman, Benjamin Gilsdorf, Patrick L. Rakers
  • Patent number: 8416034
    Abstract: 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.
    Type: Grant
    Filed: October 13, 2010
    Date of Patent: April 9, 2013
    Assignee: Ralink Technology Corporation
    Inventors: Shen Yi Liao, Shao Chin Lo
  • Patent number: 8401495
    Abstract: A high-frequency module has a configuration in which a diplexer is capable of separating the frequency bands of first and second communication systems from the frequency band of a third communication system, a first high-frequency switch is capable of separating a transmission signal of the first or second communication system from a reception signal thereof, a second high-frequency switch is capable of separating a transmission signal of the third communication system from a reception signal thereof, and a third high-frequency switch is capable of separating the reception signal of the first communication system from the reception signal of the second communication system. A reception-signal output port for the second communication system of the high-frequency module is terminated with a chip capacitor to configure the double-band high-frequency module supporting the first and third communication systems.
    Type: Grant
    Filed: January 21, 2009
    Date of Patent: March 19, 2013
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Masashi Hayakawa
  • Patent number: 8380139
    Abstract: An exemplary radio frequency interface switching device includes a plurality of signal interfaces, a plurality of switches electrically connected to the signal interfaces, and a switch unit electrically connected to the switches. The signal interfaces are electrically connected with each other by operating different combinations of the switches and the switch unit to receive/send corresponding signals.
    Type: Grant
    Filed: November 11, 2009
    Date of Patent: February 19, 2013
    Assignees: Shenzhen Futaihong Precision Industry Co., Ltd., Chi Mei Communication Systems, Inc.
    Inventor: Jian-Yan Feng
  • Patent number: 8364092
    Abstract: An active cancellation unit is disclosed for improving the noise cancellation between a transmitter and a receiver which are connected to an antenna using a duplexer, the unit comprising a coupler sampling a signal to transmit provided by the transmitter, a cancellation duplexer having characteristics similar to the duplexer and receiving the sampled signal to provide a simulated signal and an active component receiving the simulated signal and providing an amplified signal having a phase 180 degree shifted with respect to the simulated signal; and a coupler for injecting the simulated signal at the receiver.
    Type: Grant
    Filed: April 13, 2006
    Date of Patent: January 29, 2013
    Assignee: Ecole de Technologie Superieure
    Inventors: Ammar B. Kouki, Christian Talbot
  • Patent number: 8295784
    Abstract: A semiconductor switching device includes, on one semiconductor substrate: a switching circuit configured to switch connection states between a plurality of terminals; a negative voltage generating circuit; and a control circuit connected to the switching circuit and the negative voltage generating circuit and configured to supply a control signal to the switching circuit, the control circuit including: a level shift circuit with a low-potential power supply terminal connected to the negative voltage generating circuit and an output node connected to the switching circuit, the level shift circuit being configured to supply a negative potential signal as a control signal at a low level to the switching circuit; a diode with its anode connected to the output node of the level shift circuit; and a transistor with its drain-source path connected between the cathode of the diode and ground, the drain-source path switching from a blocking state to a conducting state before the potential of the output node of the le
    Type: Grant
    Filed: July 14, 2008
    Date of Patent: October 23, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Toshiki Seshita
  • Patent number: 8280316
    Abstract: In a wireless transmitting/receiving device of TDD system etc., a transmission signal is detected on the transmitting side in a specified transmission period, a signal reflected from an antenna through a circulator is detected on the receiving side in the transmission period and a reception signal is detected on the receiving side in a specified reception period. In this case, in a part of the transmission period a transmission signal having been detected on the transmitting side is selected while in the remaining part of the transmission period a reflection signal having been detected on the receiving side through a circulator from an antenna is selected, and in the reception period a reception signal having been detected on the receiving side through the circulator from the antenna is selected and outputted.
    Type: Grant
    Filed: February 1, 2010
    Date of Patent: October 2, 2012
    Assignee: Fujitsu Limited
    Inventors: Yoichi Endo, Hideyuki Kannari
  • Patent number: 8270912
    Abstract: Aspects of a method and system for a transformer in an integrated circuit package are provided. In this regard, signals may be transmitted and/or received via an antenna communicatively coupled to a transformer embedded in multi-layer integrated circuit package. The windings ratio of the transformer may be configured based on an impedance of the antenna, an impedance of a transmitter coupled to the transformer, an impedance of an LNA coupled to the transformer, and/or a power level of the received and/or transmitted signals. The windings ratio may be configured via one or more switching elements which may be MEMS switches embedded in the multi-layer IC package. The transformer may comprise a plurality of loops fabricated on a corresponding plurality of metal layers in the multi-layer IC package, and the loops may be communicatively coupled with one or more vias. The multi-layer IC package may comprise ferromagnetic and/or ferromagnetic materials.
    Type: Grant
    Filed: December 12, 2007
    Date of Patent: September 18, 2012
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza Rofougaran, Maryam Rofougaran
  • Patent number: 8270907
    Abstract: Aspects of a method and system for matching an integrated system to an antenna utilizing on-chip measurement of reflected signals are provided. In a chip comprising at least a portion of a receiver and at least a portion of a transmitter, a best impedance match between an antenna and the chip may be determined based on on-chip measurement of one or more signals reflected from the antenna. The best impedance match between the antenna and the chip may be determined utilizing a correction algorithm. The correction algorithm may be determined utilizing data from an external test set that measures signals transmitted by the chip via the antenna. The reflected signals may be routed to a signal analyzer via on on-chip directional coupler. The best impedance match may be determined for each of a plurality of frequencies and/or each of a plurality of transmit signal strengths.
    Type: Grant
    Filed: April 5, 2011
    Date of Patent: September 18, 2012
    Assignee: Broadcom Corporation
    Inventor: Thomas Baker
  • Patent number: 8254847
    Abstract: Ad-hoc networks employing cooperative signal processing are configured for detecting, identifying, and visualizing radio communication networks used by an adversary, such as enemy combatants or criminals. These networks are further configured for performing a non-passive tactical response to an adversary's communication capabilities. Such ad-hoc networks are particularly useful for identifying radio communication resources, establishing radio links, and subverting an adversary's communication capabilities in environments lacking available communication infrastructure, including battlefield environments, and locations where communication infrastructure is non-existent or has been compromised by natural disasters or terrorists attacks.
    Type: Grant
    Filed: April 16, 2008
    Date of Patent: August 28, 2012
    Assignee: Department 13, LLC
    Inventor: Robi Sen
  • Patent number: 8224244
    Abstract: The present invention provides a communication apparatus being in directly contact with a human body and using the human body as a transmission channel for data communication. The communication apparatus attached to the human body transmits a signal in the form of a current, receives a signal transmitted from another communication apparatus attached to the human body therethrough, and eliminates noise included in the received signal. In addition, the communication apparatus compares the noise-eliminated signal and a reference signal and recovers an original signal. Further, the communication apparatus generates a base-band signal and transmits the same through the human body.
    Type: Grant
    Filed: April 21, 2008
    Date of Patent: July 17, 2012
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jin-Kyung Kim, Sung-Weon Kang, Chang-Hee Hyoung, Jin-Bong Sung, Jung-Hwan Hwang, Duck-Gun Park
  • Patent number: 8208866
    Abstract: A radio frequency (RF) transceiver front-end includes an antenna, an RF receiver section, an RF transmitter section, a balancing circuit, and a multiple node isolation and coupling circuit. The multiple node isolation and coupling circuit is coupled to the antenna, the RF receiver section, the RF transmitter section, and the balancing circuit. The multiple node isolation and coupling circuit provides an inbound RF signal from the antenna to the RF receiver section and provides an outbound RF signal from the RF transmitter section to the antenna, wherein, by providing an isolating signal to the balancing circuit, the multiple node isolation and coupling circuit substantially isolates the outbound RF signal from the inbound RF signal.
    Type: Grant
    Filed: January 30, 2009
    Date of Patent: June 26, 2012
    Assignee: Broadcom Corporation
    Inventors: Mohyee Mikhemar, Hooman Darabi
  • Patent number: 8200168
    Abstract: A programmable antenna assembly includes a configurable antenna structure, a configurable antenna interface, and a control module. The configurable antenna structure includes a plurality of antenna elements that, in response to an antenna configuration signal, are configured elements into at least one antenna. The configurable antenna interface module is coupled to the at least one antenna and, based on an antenna interface control signal, provides at least one of an impedance matching circuit and a bandpass filter. The control module is coupled to generate the antenna configuration signal and the antenna interface control signal in accordance with a first frequency band and a second frequency band such that the at least one antenna facilitates at least one of transmitting and receiving a first RF signal within the first frequency band and facilitates at least one of transmitting and receiving a second RF signal within the second frequency band.
    Type: Grant
    Filed: August 23, 2011
    Date of Patent: June 12, 2012
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza (Reza) Rofougaran, Maryam Rofougaran
  • Patent number: 8185062
    Abstract: A configurable antenna assembly includes an antenna structure and a configurable antenna interface. The antenna structure is operable, in a first mode, to provide a first antenna structure and a second antenna structure, wherein the first antenna structure receives an inbound radio frequency (RF) signal and the second antenna structure transmits an outbound RF signal. The configurable antenna interface is operable in the first mode to provide a first antenna interface and a second antenna interface, wherein the first antenna interface is configured in accordance with a receive adjust signal to adjust at least one of phase and amplitude of the inbound RF signal, and wherein the second antenna interface is configured in accordance with a transmit adjust signal to adjust at least one of phase and amplitude of the outbound RF signal.
    Type: Grant
    Filed: March 28, 2011
    Date of Patent: May 22, 2012
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza (Reza) Rofougaran, Maryam Rofougaran
  • Publication number: 20120122410
    Abstract: A multiband coupling circuit including: a number of paths equal to the number of frequency bands, each path having a first terminal and a second terminal; a third terminal and a fourth terminal; a number of distributed couplers equal to the number of paths, all couplers being identical and sized according to the highest frequency band, and each coupler including a first conductive line between first and second ports connected to the first and second terminals of the concerned path, and a second conductive line coupled to the first one between third and fourth ports; a first set of attenuations between the third ports of the couplers and the third terminal of the circuit; and an array of filters between the fourth ports of the coupler and the fourth terminal of the circuit.
    Type: Application
    Filed: September 15, 2011
    Publication date: May 17, 2012
    Applicant: STMicroelectronics (Tours) SAS
    Inventors: Claire Laporte, Hilal Ezzeddine
  • Patent number: 8145144
    Abstract: A method and apparatus for providing a hearing aid compatible wireless electronic device is disclosed. The apparatus may include a lower housing having a wireless transceiver, upper housing including an earpiece, hinge assembly, and a pair of reactive matching element along with predefined placement of the wireless transceiver. The reactive matching element can be implemented at different chassis inductances to achieve hearing aid compatibility within other design constraints. Implemented as a switched circuit or reactance filter circuit to create a reactance appropriate for a band of operation during transmission in that band.
    Type: Grant
    Filed: December 28, 2007
    Date of Patent: March 27, 2012
    Assignee: Motorola Mobility, Inc.
    Inventors: Eric L. Krenz, Louis J. Vannatta
  • Patent number: 8103221
    Abstract: 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.
    Type: Grant
    Filed: May 30, 2008
    Date of Patent: January 24, 2012
    Assignee: National ICT Australia Limited
    Inventors: Chien M. Ta, Stan Skafidas, Rob Evans
  • Patent number: 8081931
    Abstract: A transceiver device and an impedance matching method are provided. In the impedance matching method, a plurality of matching modes is set. Each matching mode includes a default impedance and a corresponding default power. In addition, one of the matching modes is selected for outputting a transmission signal to a load. Besides, a response signal derived from the transmission signal is received. Further, whether the default impedance is matched with an impedance of the load or not is determined according to a parameter of the response signal. Thereby, the echo signal can be restrained from being generated.
    Type: Grant
    Filed: September 9, 2008
    Date of Patent: December 20, 2011
    Assignee: IC Plus Corp.
    Inventor: Tsu-Chun Liu
  • Patent number: 8068791
    Abstract: A Time Division Duplex (TDD) switch of a TDD wireless communication system is provided. By its unique arrangement, the TDD switch protects a receiver of the wireless system.
    Type: Grant
    Filed: April 23, 2007
    Date of Patent: November 29, 2011
    Assignee: Samsung Electronics Co., Ltd
    Inventor: Seong-Hun Kim
  • Patent number: 8055210
    Abstract: A transceiver for radio-frequency communication comprises a waveguide, a transmitting port, a receiving port and a receiver load termination. The waveguide receives and transmits radio-frequency signals. The transmitting port is connected to the waveguide and transmits the radio-frequency signals to the waveguide. The receiving port is connected to the waveguide and receives the radio-frequency signals from the waveguide. The receiver load termination is connected to the waveguide and removes the vertical polarization components of the receiving radio-frequency signals. The receiver load termination includes a filtering unit to reduce the energy of the transmitting radio-frequency signals entering the receiver load termination.
    Type: Grant
    Filed: June 17, 2008
    Date of Patent: November 8, 2011
    Assignee: Microelectronics Technology, Inc.
    Inventors: Hongru Suchen, Ping Chin Tseng
  • Patent number: 8027646
    Abstract: A communication system is supplied for filtering and attenuating a receive signal in between a bi-directional antenna system and a bi-directional base station system. In the communication system, a first circulator is configured to receive a receive signal from a first bi-directional link coupled to the bi-directional antenna system and circulate the receive signal to a first uni-directional link. A signal processing system is configured to receive the receive signal from the first uni-directional link, filter and attenuate the receive signal, and transfer the receive signal to a second uni-directional link. A second circulator is configured to receive the receive signal from the second uni-directional link, circulate the receive signal to a second bi-directional link coupled to the bi-directional base station system, receive a transmit signal from the second bi-directional link, and circulate the transmit signal to a third uni-directional link.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: September 27, 2011
    Assignee: Clear Wireless LLC
    Inventors: Walter F. Rausch, Harry W. Perlow, Habib Riazi