Single Antenna Switched Between Transmitter And Receiver Patents (Class 455/83)
  • Patent number: 8554155
    Abstract: A device for multiple band frequency communication may include a chassis, a transceiver for receiving and transmitting voice and data communications over any one of multiple frequency bands, an antenna assembly comprising a single radiator and an antenna matching unit, and an antenna connector provided on the chassis for mounting the antenna assembly to the device and connecting the antenna assembly to the transceiver via a transmission line, wherein the antenna matching unit is provided between the radiator and the antenna connector and comprises a reactive circuit to filter the communications and transform an impedance between the radiator and the antenna connector to match an impedance between the transceiver and the antenna connector for each of the multiple frequency bands. A method and system is disclosed for communicating voice and data communications over multiple frequency bands.
    Type: Grant
    Filed: January 12, 2011
    Date of Patent: October 8, 2013
    Assignee: Thales Communications, Inc.
    Inventor: Andrew Gobien
  • Patent number: 8554154
    Abstract: An electronic device is provided. The device comprises a radio transceiver, a processor, a memory, a connector, and an application stored in the memory. The connector is for coupling a radio frequency signal between the radio transceiver and an external antenna and for coupling a baseband signal between the first processor and an external processor. The application, when executed by the processor, manages the radio transceiver based on baseband messages received over the connector from the external processor, wherein the application managing the radio transceiver comprises causing the radio transceiver to transmit the radio frequency signal over the connector to the external antenna and causing the radio transceiver to receive the radio frequency signal over the connector from the external antenna.
    Type: Grant
    Filed: March 16, 2010
    Date of Patent: October 8, 2013
    Assignee: Sprint Communications Company L.P.
    Inventors: John M. Everson, Bradley A. Kropf
  • Patent number: 8552816
    Abstract: A user equipment (UE) front end (FE) that is adapted for multiband simultaneous transmission and reception is provided. The UE FE includes a first multi-filter device having a transmit (TX) band-pass filter adapted to pass a first TX signal band associated with a first radio access technology type, and a receive (RX) band-pass filter adapted to pass a second RX signal band associated with a second radio access technology type. The UE FE also includes a second multi-filter device having a TX band-pass filter adapted to pass a second TX signal band associated with the second radio access technology type and an RX band-pass filter adapted to pass the first RX signal band associated with the first radio access technology type. The first radio access technology type and the second radio access technology type are preferably long term evolution (LTE) and code division multiple access 2000 (CDMA2000), respectively, or vice versa.
    Type: Grant
    Filed: December 16, 2010
    Date of Patent: October 8, 2013
    Assignee: RF Micro Devices, Inc.
    Inventor: Nadim Khlat
  • Publication number: 20130252563
    Abstract: Methods and apparatus for voice and data interlacing in a system having a shared antenna. In one embodiment, a voice and data communication system has a shared antenna for transmitting and receiving information in time slots, wherein the antenna can only be used for transmit or receive at a given time. The system determines timing requirements for data transmission and reception and interrupts data transmission for transmission of speech in selected intervals while meeting the data transmission timing and throughput requirements. The speech can be manipulated to fit with the selected intervals, to preserve the intelligibility of the manipulated speech.
    Type: Application
    Filed: March 21, 2012
    Publication date: September 26, 2013
    Applicant: Raytheon Company
    Inventors: David R. Peterson, Timothy S. Loos, David F. Ring, James F. Keating
  • Patent number: 8543068
    Abstract: A transceiver node includes a pulse coupled oscillator in an integrated circuit, which can synchronize with other nodes to generate a global clock subsequently used to facilitate synchronous communications between individual nodes. Known potential uses include a low power sensor node radio for an ad-hoc network for military applications and medical applications such as ingestible and implantable radios, self powered radios, and medical monitoring systems such as cardiac and neural monitoring patches.
    Type: Grant
    Filed: August 4, 2008
    Date of Patent: September 24, 2013
    Assignee: Cornell University
    Inventors: Xiao Y. Wang, Alyssa B. Apsel
  • Patent number: 8536957
    Abstract: Provided is a high-frequency circuit module that has high mounting density. In a high-frequency circuit module 100, an RFIC 160 that performs transmission and reception processes for high-frequency signals, a power amplifier IC 155 that amplifies a transmission signal from the RFIC, and a duplexer 110 that separates a transmission signal outputted from the power amplifier IC 155 to an antenna and a reception signal that is inputted from the antenna to the RFIC 160 are formed on the top surface thereof. The duplexer 110 is disposed between the RFIC 160 and the power amplifier IC 155.
    Type: Grant
    Filed: August 23, 2012
    Date of Patent: September 17, 2013
    Assignee: Taiyo Yuden Co., Ltd.
    Inventors: Hiroshi Nakamura, Tomohiro Igarashi
  • Patent number: 8531252
    Abstract: A small antenna duplexer that includes antenna terminal, first filter electrically connected to this antenna terminal and passing a first frequency band, second filter electrically connected to antenna terminal and passing a second frequency band, and third filter electrically connected to antenna terminal and passing a third frequency band. First filter and third filter are used for one band, and second filter and third filter are used for another band.
    Type: Grant
    Filed: July 8, 2008
    Date of Patent: September 10, 2013
    Assignee: Panasonic Corporation
    Inventors: Hiroyuki Nakamura, Tetsuya Tsurunari, Joji Fujiwara
  • Patent number: 8532584
    Abstract: RF switching devices are provided that alternatively couple an antenna to either a transmitter amplifier or a receiver amplifier. An exemplary RF switching device comprises two valves, one for a receiver transmission line between the antenna and the receiver amplifier, the other for a transmitter transmission line between the antenna and the power amplifier. Each valve is switchably coupled between ground and its transmission line. When coupled to ground, current flowing through the valve increases the impedance of the transmission line thereby attenuating signals on the transmission line. When decoupled from ground, the impedance of the transmission line is essentially unaffected. The pair of valves is controlled such that when one valve is on the other valve is off, and vice versa, so that the antenna is either receiving signals from the power amplifier or the receiver amplifier is receiving signals from the antenna.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: September 10, 2013
    Assignee: ACCO Semiconductor, Inc.
    Inventor: Denis A. Masliah
  • Patent number: 8521099
    Abstract: A transceiver includes a processor, which is adapted to in a transmit mode of the transceiver, form at least part of a transmitter and in a receive mode of the transceiver, form at least part of a receiver. The transceiver may include at least one analog-to-digital converter to provide digital signals to the processor in both the transmit and receive modes of operation; and the transceiver may include at least one digital-to-analog converter to receive digital signals from the processor in the transmit and receive modes of operation. The processor may be fabricated on an integrated circuit with at least one of the analog-to-digital converters and/or with at least one of the digital-to-analog converters.
    Type: Grant
    Filed: June 29, 2007
    Date of Patent: August 27, 2013
    Assignee: Silicon Laboratories Inc.
    Inventors: Lawrence Der, George Tyson Tuttle, Alessandro Piovaccari, Chunyu Xin, Scott Haban, Javier Elenes, Dan Kasha, Peter Vancorenland
  • Patent number: 8521090
    Abstract: Embodiments of the invention may provide for reducing interference in the front-end of a communications receiver. The cancellation circuitry may be utilized in conjunction with a preliminary rejection filter for improved rejection of out-of-band interference from other radio services or circuitry. The cancellation circuit may be placed in parallel with the preliminary rejection filter and may enhance suppression at the interference frequency by matching the gain and phase of the preliminary rejection filter prior to subtracting the matched signal from the preliminary rejection filter output. The cancellation circuit need not necessary know beforehand the characteristics of the preliminary rejection filter, the interference source, or the coupling mechanism, as it may adapt to unknown or varying interferers by adapting the matching gain and phase values based on the output of the preliminary rejection filter at tap points occurring both before and after application of the cancellation signal.
    Type: Grant
    Filed: March 25, 2010
    Date of Patent: August 27, 2013
    Assignee: Samsung Electro-Mechanics
    Inventors: Andrew Joo Kim, Yunseo Park, Seongmo Yim, Youngsik Hur
  • Patent number: 8521100
    Abstract: A configurable transceiver includes an RF receiver section that generates at least one downconverted signal from a received RF signal. A receiver processing module processes at least one downconverted signal in a plurality of receiver stages to produce a stream of inbound data, wherein the receiver processing module is configurable in response to a control signal to selectively bypass at least one of the plurality of receiver processing stages. A transmitter processing module processes outbound data in a plurality of transmitter stages to produce at least one baseband signal, wherein the receiver processing module is configurable in response to the control signal to selectively bypass at least one of the plurality of transmitter processing stages. An RF transmitter section generates at least one RF signal from the at least one baseband signal.
    Type: Grant
    Filed: October 29, 2012
    Date of Patent: August 27, 2013
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza Rofougaran
  • Patent number: 8515495
    Abstract: A device and method including a plurality of transmitters and/or receiver units and antennae therefore, and wherein each of said units are arranged radially to cover a plurality of sectors; and including at least one component necessary for the operation of said units, and arranged such that said component is shared between two or more units and/or their respective antennae. The device and method has application to MIMO systems.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: August 20, 2013
    Assignee: Nokia Siemens Networks Oy
    Inventors: Rong Rong Shang, Zhu Yan Zhao, Seppo Olavi Hamalainen, Osman Nuri Can Yilmaz
  • Patent number: 8504111
    Abstract: In various embodiments of the present disclosure, an apparatus for wirelessly transmitting or receiving communication signals may include multiple active elements to transmit or receive communication signals wirelessly; and multiple active modules correspondingly coupled to the multiple active elements and configured to cooperate with respective ones of the multiple active elements; in which the respective ones of the multiple active modules include a power amplifier configured to amplify communication signals to be transmitted and a low noise amplifier configured to amplify communication signals received, and in which the respective ones of the multiple active modules further include a first phase shift configured to shift phases of the communication signals to be transmitted and a second phase shift configured to shift phases of the communication signals received. Other embodiments may be described and claimed.
    Type: Grant
    Filed: April 23, 2010
    Date of Patent: August 6, 2013
    Assignee: Empire Technology Development LLC.
    Inventor: Jigang Liu
  • Patent number: 8498584
    Abstract: Systems and methods are disclosed for an electronically adjustable signal filter system, which comprises, in some embodiments, a first filter coupled to an antenna coupling network and a second filter, a power amplifier coupled to the first filter, an antenna connected to an antenna coupling network, a pilot tone generator coupled to the first filter, and a first signal source connected to the power amplifier and first filter. In some embodiments, the power amplifier amplifies the first signal, the first filter places a notch into the first signal transmitted to the antenna coupling network, the antenna coupling network combines the first signal and a second signal received from the antenna and transmits a third signal to the second filter.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: July 30, 2013
    Assignee: Research In Motion Limited
    Inventors: Alain Roussel, Charles W. T. Nicholls
  • Patent number: 8494455
    Abstract: Methods and apparatus for a resonant transmit/receive switch with transformer gate/source coupling. The resonant transmit/receive (T/R) switch includes a switchable inductor having a first inductance value for use in receive (Rx) mode and a second inductance value for use in transmit (Tx) mode. The first inductance value is used for input matching to a low noise amplifier in Rx mode. The second inductance value is selected to resonant with parasitic capacitance of the antenna port to produce a high impedance in Tx mode. In one implementation, the switchable inductor is gate sourced coupled to at least one of first and second inductors of a low noise amplifier (LNA), thereby allowing use of smaller inductors due to the resulting coupling factor.
    Type: Grant
    Filed: November 19, 2009
    Date of Patent: July 23, 2013
    Assignee: QUALCOMM, Incorporated
    Inventor: Ngar Loong A. Chan
  • Patent number: 8489035
    Abstract: A radio communication transceiver includes a transformer, a switch, a power amplifier (AP), and a low noise amplifier (LNA). The transformer has a primary winding and a center-tap secondary winding, the primary winding has a first endpoint and a second endpoint, and the center-tap secondary winding has a first endpoint, a second endpoint, and a third endpoint. The switch has a gate, a drain, and a source, in which the gate receives a control signal (CS), the drain is connected to the second endpoint of the primary winding of the transformer through a coupling capacitor, and the source is grounded. The PA has at least one output terminal connected to the first endpoint and the second endpoint of the center-tap secondary winding of the transformer. The LNA has an input terminal connected to the second endpoint of the primary winding of the transformer.
    Type: Grant
    Filed: September 28, 2010
    Date of Patent: July 16, 2013
    Assignee: ISSC Technologies Corp.
    Inventors: Ming Chou Chiang, Hsin Chieh Huang
  • Publication number: 20130165057
    Abstract: A radio frequency (RF) transmission circuit and an electronic device and a method for saving power thereof are provided. The RF transmission circuit includes: an antenna, at least one controller, a first path, a second path and a signal switching unit. The controller generates and/or receives RF signal. The controller has a determination function determining power of the RF signal and a switching function selecting or changing the transmission path of the RF signal as the first path and the second path. The first path transmits the RF signal to the antenna. The second path has a power amplifier to amplify the power of the RF signal and then transmit the amplified RF signal to the antenna. The signal switching unit selectively connects the antenna to the first path or the second path. When the first path is selected, the controller turns off the power amplifier.
    Type: Application
    Filed: May 31, 2012
    Publication date: June 27, 2013
    Applicant: GETAC TECHNOLOGY CORPORATION
    Inventors: YEN-CHING LEE, SHANG-MING CHIU
  • Patent number: 8472887
    Abstract: A radio frequency integrated circuit (and method of making) for enhancing wireless communication and/or sensing systems comprising a base comprising a gallium arsenide (GaAs) substrate; a binary phase shift keying modulator fabricated on the base; a power amplifier fabricated on the base and operatively associated with the binary phase shift keying modulator; the power amplifier having a first shunt operatively associated therewith; a transmit/receive switch fabricated on the base, the transmit/receive switch being operatively associated with the power amplifier and being alternately connectable to an antenna port adapted to be connected to an antenna; a low noise amplifier fabricated on the base; the low noise amplifier being alternately connectable to the antenna port, the low noise amplifier having a second shunt operatively associated therewith; the circuit operating in a transmit stage in which the power amplifier is connected to the antenna port and in a receive stage in which the low noise amplifier is
    Type: Grant
    Filed: September 9, 2010
    Date of Patent: June 25, 2013
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: John Edward Penn, Gregory Allen Mitchell
  • Patent number: 8467738
    Abstract: A radio frequency (RF) front end circuit for connecting an antenna to a transceiver having multiple operating modes is disclosed. The circuit has a first transmit input receptive to signals of a first operating mode and a second operating mode from the transceiver. There is also a second transmit input receptive to signals of a third operating mode from the transceiver. The circuit has a first power amplifier for the first and second operating modes, a second power amplifier for the first operating mode, and a third power amplifier for the second and third operating mode. A first switch network selectively interconnects the first transmit input to a one of the second and third power amplifiers.
    Type: Grant
    Filed: May 3, 2010
    Date of Patent: June 18, 2013
    Assignee: RFaxis, Inc.
    Inventor: Oleksandr Gorbachov
  • Patent number: 8457685
    Abstract: A radio frequency (RF) circuit including control circuitry adapted to select one of multiple modes, including a first transmit mode and a first receive mode. The first receive circuitry is coupled to a first node, and the first node is coupled to a first antenna. During the first receive mode the first receive circuitry is adapted to receive a first RF input signal having a first receive frequency. First power amplifier circuitry including a first final stage provides a first RF output signal having a first transmit frequency for transmission from the first antenna during the first transmit mode. First impedance transformation circuitry is coupled between an output of the first final stage and the first node. During the first receive mode the first final stage is disabled and the first final stage and the first impedance transformation circuitry present a substantially high impedance to the first node.
    Type: Grant
    Filed: April 20, 2010
    Date of Patent: June 4, 2013
    Assignee: RF Micro Devices, Inc.
    Inventors: Ruediger Bauder, James M. Retz
  • Patent number: 8452235
    Abstract: Exemplary embodiments are directed to communicating information relating to wireless charging. A power transmitting system includes a host device with a transmit antenna. A communication interface conveys receiver information, which includes unique identifier information, from a receiver device to the host device. A controller on the host device monitors and processes the receiver information to generate notification information, which is presented to a user on a user-perceivable notifier. The transmit antenna generates an electromagnetic field at a resonant frequency to create a coupling-mode region within a near-field of the transmit antenna. The system can detect a presence of a receiver device with a receive antenna that is in the coupling-mode region and process a request for power from the receiver device. The system can also notify a user when a host device is leaving a designated region and whether the host device includes expected receiver devices.
    Type: Grant
    Filed: October 2, 2009
    Date of Patent: May 28, 2013
    Assignee: Qualcomm, Incorporated
    Inventors: Miles Alexander Lyell Kirby, Anne Katrin Konertz, Virginia Walker Keating, Craig Lauer, Michael John Mangan
  • Patent number: 8452300
    Abstract: Apparatuses and methods of transmitting a signal with reduced interference in a femto base station including a plurality of antennas having different radiation patterns are provided. A method includes transmitting common information through the plurality of antennas having the different radiation patterns; receiving feedback information corresponding to the common information; analyzing the feedback information; temporarily selecting one of the plurality of antennas as a transmission antenna, based on a result of the analyzing; and transmitting user information through the transmission antenna.
    Type: Grant
    Filed: March 2, 2010
    Date of Patent: May 28, 2013
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Yu Suk Yun, Dong Hee Kang, Dae Whan Back, Dae Ryong Lee, Kwang Jin Ahn, Byung Wan Yu
  • Patent number: 8442453
    Abstract: A radio communication transceiver achieving impedance matching when the transceiver operates in an output state and an input state respectively in a manner of switching a switch includes a transformer, a switch, a power amplifier (PA), and a low noise amplifier (LNA). The transformer has a primary winding including a first endpoint and a second endpoint and a secondary winding including a first endpoint and a second endpoint. The switch has a gate, a drain, and a source, wherein the gate receives a control signal, the drain is connected to the second endpoint of the primary winding, and the source is connected to the second endpoint of the secondary winding. The PA has an output terminal connected to the first endpoint of the primary winding of the transformer. The LNA has an input terminal connected to the second endpoint of the primary winding of the transformer.
    Type: Grant
    Filed: October 27, 2010
    Date of Patent: May 14, 2013
    Assignee: ISSC Technologies Corp.
    Inventors: Ming Chou Chiang, Hsin Chieh Huang
  • Patent number: 8442451
    Abstract: Circuits, methods, and apparatus that provide isolation between receive and transmit circuits in a wireless transceiver. One example provides switches that can be included on an integrated circuit with at least portions of a wireless transceiver. These switches vary the impedance of transmitter and receiver circuits between a termination impedance and a high impedance by inserting or removing components in parallel with matching networks. Signal losses are minimized since these switches are shunt connected to input and output paths on the wireless circuit and are not connected directly in either signal path.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: May 14, 2013
    Assignee: Marvell International Ltd.
    Inventors: Chun-Geik Tan, Randy Tsang, Wayne A. Loeb
  • Patent number: 8417201
    Abstract: The present disclosure relates to multi-mode RF power amplifier (PA) circuitry that may include a first PA path and a second PA path, each of which is fed from a common RF input. During a first operating mode, the first PA path receives and amplifies a first RF input signal via the common RF input, and during a second operating mode, the second PA path receives and amplifies a second RF input signal via the common RF input. To facilitate sharing of the common RF input, during the first operating mode, the second PA path is substantially de-coupled from the common RF input, and during the second operating mode, the first PA path is substantially de-coupled from the common RF input. By sharing the common RF input, size and costs of the multi-mode RF PA circuitry may be reduced.
    Type: Grant
    Filed: June 24, 2010
    Date of Patent: April 9, 2013
    Assignee: RF Micro Devices, Inc.
    Inventor: Derek Schooley
  • Patent number: 8412261
    Abstract: The present invention is directed to reducing leakage of a transmitting signal to a receiving unit in a wireless communication system with a transmitting unit and the receiving unit sharing an antenna.
    Type: Grant
    Filed: November 6, 2009
    Date of Patent: April 2, 2013
    Assignee: Phychips Inc.
    Inventor: Jinsung Yi
  • Patent number: 8412118
    Abstract: An integrated circuit radio transceiver and method therefor comprises a receiver front end that further includes a plurality of in-phase and quadrature phase receive processing block operable at first and second frequency bands wherein each of the receive processing blocks defines an ingoing signal path and further includes a plurality of filtering and amplification blocks disposed within the corresponding ingoing signal path, a plurality of RSSI blocks coupled to receive an ingoing analog signal from a corresponding plurality of nodes disposed throughout the ingoing signal path, each of the plurality of received signal strength indicator blocks producing a signal strength indication, and wherein a baseband processor is operable to receive a selected signal strength indication and to produce at least one gain setting to at least one amplification block within the in-phase or quadrature phase receive processing blocks.
    Type: Grant
    Filed: February 22, 2010
    Date of Patent: April 2, 2013
    Assignee: Broadcom Corporation
    Inventors: Adedayo Ojo, Arya Reza Behzad
  • Patent number: 8406713
    Abstract: When switching the mode of a power amplifier between a compressed mode and an uncompressed mode, an accurate transmission power control is realized. A transmission power control method includes calculating an intra-mode output power error from a power setting value in a mode before switching as a comparison standard value error (equal to step ST32), setting a power setting value of a mode to switch to, such that an inter-mode output power error is canceled (equal to step ST33), calculating an intra-mode output power error from a power setting value of a mode to switch to (equal to step ST35), calculating a gain linearity value based on a power setting value of a mode to switch to and the intra-mode output power error (equal to step ST36), and resetting the power setting value of the mode to switch to, that cancels the comparison standard value error in the mode before switching and the output power error in the mode to switch to, based on the gain linearity value (equal to steps ST37 and 38).
    Type: Grant
    Filed: November 18, 2010
    Date of Patent: March 26, 2013
    Assignee: Panasonic Corporation
    Inventors: Akihiko Matsuoka, Tomoya Urushihara
  • Patent number: 8406357
    Abstract: A filter circuit including first and second real filters of a zero-IF scheme. The first and second real filters receive an I component and a Q component separated from a reception signal, respectively; and a switch section for producing a complex filter by switchably connecting the first and second real filters through interconnection elements. The switch section further receiving a switching signal for connecting the first and second real filters, thereby switching from the zero-IF scheme to a low-IF scheme.
    Type: Grant
    Filed: February 20, 2008
    Date of Patent: March 26, 2013
    Assignee: Fujitsu Limited
    Inventors: Daisuke Yamazaki, Kazuhiko Kobayashi, Kazuaki Oishi
  • Publication number: 20130072135
    Abstract: Systems, methods, and other embodiments associated with wireless coexistence through antenna switching are described. According to one embodiment, a method includes selecting one or both of a first transceiver and a second transceiver for connection to an antenna, based, at least in part, on the operating mode of the first transceiver and the second transceiver. The method includes connecting the selected transceiver(s) to the antenna, such that the selected transceiver(s) is enabled to communicate on the antenna and any transceiver(s) not selected is not able to communicate on the antenna.
    Type: Application
    Filed: September 14, 2012
    Publication date: March 21, 2013
    Inventors: Raja Banerjea, Josselin de la Broise, Harish Ramamurthy
  • Patent number: 8401492
    Abstract: A high frequency switch module includes a laminated circuit component that includes an antenna electrode connected to a single antenna, a plurality of communication electrodes connected to a plurality of high frequency communication circuits to transmit, receive, or transmit and receive plural kinds of communication signals, and a land arranged to mount a switch IC on, and a switch IC that is mounted on the laminated circuit component and includes a common terminal connected to the single antenna through the laminated circuit component, and a plurality of communication circuit terminals connected to the plurality of high frequency communication circuits through the laminated circuit component. The switch IC is provided with switch circuits between the communication circuit terminals and the common terminal, and all of the switch circuits have the same or substantially the same resistance against transmission power applied at the time of transmission.
    Type: Grant
    Filed: May 25, 2010
    Date of Patent: March 19, 2013
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Takanori Uejima, Hisanori Murase, Ken Tonegawa
  • Patent number: 8401496
    Abstract: A semiconductor antenna switch has an antenna terminal, a transmission terminal and a reception terminal. The antenna switch is capable of reducing harmonic distortion even though it includes field effect transistors formed over a silicon substrate. A shunt transistor including a plurality of series-connected field effect transistors is connected between he transmission terminal and a common terminal, such as a common terminal, which may be an electrical ground. Off capacitances and/or gate widths of a plurality of the series-connected field effect transistors increase monotonically in the direction from the common terminal to the transmission terminal, or equivalently, decrease monotonically in the direction from the transmission terminal to the common terminal.
    Type: Grant
    Filed: May 23, 2011
    Date of Patent: March 19, 2013
    Assignee: Renesas Electronics Corporation
    Inventors: Satoshi Goto, Masao Kondo
  • Patent number: 8401497
    Abstract: A transceiver includes an RF receiver section having a plurality of RF receiver stages configured in parallel, and a configurable RF transmitter section. The plurality of RF receiver stages are selectively enabled in response to a control signal. The configurable RF transmitter section is configured to operate in one of: a mixed signal mode of operation and a phase modulation mode of operation, in response to the control signal.
    Type: Grant
    Filed: July 26, 2012
    Date of Patent: March 19, 2013
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Patent number: 8396430
    Abstract: Disclosed are a semiconductor integrated circuit device and a wireless communication system that are capable of improving reception sensitivity. The wireless communication system includes, for instance, a first duplexer, a second duplexer, a first low-noise amplifier circuit, and a second low-noise amplifier circuit. A transmission band compliant with a communication standard is split into two segments for use, namely, low- and high-frequency transmission bands. A reception band compliant with the communication standard is split into two segments for use, namely, low- and high-frequency reception bands. The first duplexer uses the low-frequency transmission band and low-frequency reception band as passbands. The second duplexer uses the high-frequency transmission band and high-frequency reception band as passbands.
    Type: Grant
    Filed: May 24, 2011
    Date of Patent: March 12, 2013
    Assignee: Renesas Electronics Corporation
    Inventors: Taizo Yamawaki, Tomonori Tanoue, Kazuaki Hori
  • Patent number: 8396508
    Abstract: In a video processing system, a method and system for a mobile receiver architecture for European (EU) Band cellular and broadcasting are provided. Receive channels may be processed in at least one radio frequency front end (RFFE) in a mobile terminal and may comprise at least one of a VHF/UHF broadcast channel and EU band cellular channels capable of carrying voice and data. The cellular channels may be WCDMA 2100 MHz, GSM 1800 or 900 MHz. A single cellular/broadcast radio frequency integrated circuit (RFIC) may be utilized for processing the receive channels. In another embodiment, a cellular band RFIC may process the EU band cellular channels and a broadcast RFIC may process the broadcast channel. Moreover, a first RFIC may process the WCDMA channel, a second RFIC may process the GSM channels, and a broadcast RFIC may process the broadcast channel.
    Type: Grant
    Filed: December 13, 2004
    Date of Patent: March 12, 2013
    Assignee: Broadcom Corporation
    Inventors: Pieter Gert Wessel van Rooyen, Kwan Young Shin
  • Patent number: 8391805
    Abstract: According to one embodiment, a semiconductor switch circuit includes a switch section, a decoder section, a DC-DC converter, a driver section, a first filter circuit, a first filter bypass circuit and a first bypass control circuit. The switch section includes an input-output terminal, radio frequency signal terminals, and semiconductor switch elements. The decoder section generates a switch control signal controlling a conduction and a non-conduction state of switch elements. The DC-DC converter generates a first potential. The driver section supplies the first and a second potential to a gate electrode of the switch elements. The first filter circuit is electrically connected between the DC-DC converter and the driver section and outputs the first potential to the driver section. The first filter bypass circuit is electrically connected with the first filter circuit. The first bypass control circuit supplies a first mode signal to the first filter bypass circuit.
    Type: Grant
    Filed: March 21, 2011
    Date of Patent: March 5, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Toshifumi Ishimori, Toshiki Seshita, Mitsuru Sugawara
  • Publication number: 20130052969
    Abstract: According to one embodiment, a semiconductor switch includes a power supply, a driver, a switch section, and a first potential controller. The power supply includes a first potential generator and a second potential generator. The first potential generator is configured to generate a negative first potential. The second potential generator is configured to generate a positive second potential that a power supply potential is stepped down. The driver is supplied with the first potential and a third potential and configured to output at least one of the first potential and the third potential based on a terminal switching signal. The switch section is configured to connect a common terminal to any one of a plurality of radio frequency terminals according to an output of the driver. The first potential controller includes a divider and an amplifier.
    Type: Application
    Filed: March 15, 2012
    Publication date: February 28, 2013
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventor: Toshiki SESHITA
  • Publication number: 20130051287
    Abstract: An RF front-end module includes power amplifiers, transmission-side filters, a reception-side filter, and a switch IC. A first transmission signal is output from a first transmission signal input terminal to a first common terminal via the power amplifier and the transmission-side filter. A second transmission signal is output from a second transmission signal input terminal to a second common terminal via the power amplifier and the transmission-side filter. A first reception signal input from the first common terminal and a second reception signal input from the second common terminal are input via the switch IC to the reception-side filter, common to the first and second reception signals, and are output from the reception-side filter to a reception signal output terminal.
    Type: Application
    Filed: August 14, 2012
    Publication date: February 28, 2013
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventors: Tomohide ARAMATA, Hidemori AKAGI
  • Patent number: 8385847
    Abstract: A switching element is provided that realizes an stabilize a potential between the gates of the multi-gates without an increase in the insertion loss, and an antenna switch circuit and a radio frequency module each using the switch element. The switching element includes two ohmic electrodes 39, 40 formed on a semiconductor substrate, at least two gate electrodes 41, 42 disposed between the two ohmic electrodes, and a conductive region 45 disposed between the adjacent gate electrodes among the at least two gate electrodes, a field effective transistor being structured by the two ohmic electrodes, the at least two gate electrodes, and the conductive region. The conductive region has a wider portion that is wider in width than the conductive region interposed between the adjacent gate electrodes on one end thereof. The distance between the adjacent gate electrodes is narrower than the width of the wider portion. Resistors 44, 46 are connected in series between the two ohmic electrodes through the wider portion.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: February 26, 2013
    Assignee: Renesas Electronics Corporation
    Inventors: Takashi Ogawa, Shinichiro Takatani, Shigeki Koya, Hiroyuki Takazawa, Shinya Osakabe, Akishige Nakajima, Yasushi Shigeno
  • Patent number: 8385845
    Abstract: Embodiments include but are not limited to apparatuses and systems including a first active device located on a signal path between an antenna terminal and a transmit and/or receive (T/R) terminal, and a self-biasing shunt device coupled to the first active device and including a second active device having a DC-blocked source terminal and a non-DC-blocked drain terminal. Other embodiments may be described and claimed.
    Type: Grant
    Filed: October 9, 2009
    Date of Patent: February 26, 2013
    Assignee: Triquint Semiconductor, Inc.
    Inventor: Philippe Cortese
  • Patent number: 8385851
    Abstract: A radio communication method includes generating a first transmit RF signal and a second transmit RF signal from a data signal to be transmitted. Each of the first and second transmit RF signals have a power spectrum in symmetric shape in the frequency domain. The first transmit RF signal and the second transmit RF signal are transmitted at a different time. The first transmit RF signal and the second transmit RF signal are received to generate a first received RF signal and a second received RF signal. The data signal from the first received RF signal and the second received RF signal are reproduced.
    Type: Grant
    Filed: September 12, 2007
    Date of Patent: February 26, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Ren Sakata, Koji Akita, Koichiro Ban, Noritaka Deguchi
  • 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: 8374557
    Abstract: A front end circuit for selectively coupling a first antenna and a second antenna to a transmit chain and a receive chain of a radio frequency (RF) transceiver is disclosed. There is a first power amplifier having an input connectible to the transmit chain of the RF transceiver, a first low noise amplifier having an output connectible to the receive chain of the RF transceiver, and a second low noise amplifier with an input connectible to the second antenna, as well as an output connectible to the receive chain of the RF transceiver. A first matching and switch network is connected to the first antenna, the output of the first power amplifier, and the input of the first low noise amplifier. Transmit signals from the first power amplifier and receive signals from the first antenna are selectively passed to the first antenna and the first low noise amplifier.
    Type: Grant
    Filed: July 2, 2010
    Date of Patent: February 12, 2013
    Assignee: RFAXIS, Inc.
    Inventor: Oleksandr Gorbachov
  • Publication number: 20130035048
    Abstract: A Radio Frequency (RF) front end system and method are disclosed. The RF front end system comprises an antenna, a matching network coupled to the antenna, a power amplifier (PA) coupled to the matching network via a port on a transmit path, a low noise amplifier (LNA) coupled to the matching network via the port on a receive path and at least one transmit/receive switch (T/R SW) coupled between the port and at least one of the PA and LNA.
    Type: Application
    Filed: August 5, 2011
    Publication date: February 7, 2013
    Inventors: Yuen Hui Chee, Albert Chia-Wen Jerng
  • Patent number: 8369796
    Abstract: A wireless device using natural higher order harmonics on multi-band reconfigurable antenna designs where the antenna higher order resonance is used to build a multi-band to multi-band frequency reconfigurable antenna.
    Type: Grant
    Filed: December 22, 2006
    Date of Patent: February 5, 2013
    Assignee: Intel Corporation
    Inventors: Helen K. Pan, Songnan Yang, Debabani Choudhury, Vijay K. Nair
  • Patent number: 8369268
    Abstract: A multiple device to one-antenna combining circuit for transferring wireless communication signals from a first and second wireless communication device connected to a donor antenna is described. The circuit comprises a first single-stage circulator configured to be coupled to a transmission-reception path of the first wireless communications device; a two-stage circulator coupled to the first single-stage circulator and configured to be coupled a transmission-reception path of the second wireless communications device; a two-way splitter coupled to the two-stage circulator and configured to be coupled a transmission-reception path of the donor antenna; and a second single-stage circulator coupled between the two-way splitter and the first single stage circulator. The wireless transmissions of the first wireless communications device travel from the first signal stage circulator to the two-stage circulator to the two-way splitter to the donor antenna. The first wireless device can be a repeater.
    Type: Grant
    Filed: November 6, 2009
    Date of Patent: February 5, 2013
    Assignee: Clearwire IP Holdings LLC
    Inventor: Walter F. Rausch
  • Publication number: 20130029614
    Abstract: Systems, methods, and apparatuses may provide for antenna switch controllers. An example antenna switch controller may include: a plurality of antenna switches commonly connected to one or more antennas, where each of the plurality of antenna switches includes a plurality of stacked transistors, where one of the plurality of antenna switches is enabled when transmitting or receiving one or more radio frequency (RF) signals via the one or more antennas; a voltage generator that receives an external supply voltage from a battery, where the voltage generator generates an internal supply voltage, where the internal supply voltage remains constant despite fluctuations in the external supply voltage from the battery; a clock buffer that generates clock signals from the constant internal supply voltage; and a charge pump that receives the clock signals and generates a constant negative voltage, where the constant negative voltage is for biasing of one or more of the plurality of antenna switches that are disabled.
    Type: Application
    Filed: July 29, 2011
    Publication date: January 31, 2013
    Applicant: SAMSUNG ELECTRO-MECHANICS COMPANY
    Inventors: Changhyuk Cho, Jeongwon Cha, Minsik Ahn, Chang-Ho Lee, Wyangmyong Woo, Jae Joon Chang
  • Publication number: 20130023221
    Abstract: The present invention relates to an RF antenna switch circuit, a high frequency antenna component, and a mobile communication device. According to the present invention, an RF antenna switch circuit including: an antenna; an input/output terminal including at least one transmitting terminal and at least one receiving terminal; at least one transmitting switch block disposed on a transmitting path(s) between the at least one transmitting terminal and a common node; at least one receiving switch block disposed on a receiving path(s) between the at least one receiving terminal and the common node; and a common switch block sharing a switching device and turned on by synchronizing with each of transmitting and receiving operations on transceiving the signal through the antenna is provided. When one of the transmitting and receiving operations is turned on, the other is turned off.
    Type: Application
    Filed: May 2, 2012
    Publication date: January 24, 2013
    Inventors: Yu Sin Kim, Sung Hwan Park
  • Publication number: 20130005279
    Abstract: According to one embodiment, a semiconductor switch includes a switch section, a driver, and a power supply. The switch section switches a connection between a common terminal and a plurality of radio-frequency terminals. The driver outputs a control signal to the switch section based on a terminal switching signal. The power supply generates a first potential based on a reference potential varying in accordance with temperature and outputs the first potential to the driver.
    Type: Application
    Filed: March 16, 2012
    Publication date: January 3, 2013
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Toshifumi ISHIMORI, Toshiki Seshita
  • Patent number: 8335478
    Abstract: Provided are a first filter 63a and a second filter 63b each having a pass band in the range of a frequency band that is obtained by, for example, substantially bisecting a frequency band of f1 to f4. In that case, the regions of the first filter 63a and the second filter 63b partially overlap with each other with the center frequency f5 interposed therebetween. In practice, even if the division is not bisection, a configuration is adopted in which a frequency region of the wider band (the first frequency band 61a) closer to a second frequency band 61b side is covered by the second filter 63b. Accordingly, it is possible to suppress the influence of load fluctuation in a multiband-compatible radio communication device.
    Type: Grant
    Filed: July 30, 2008
    Date of Patent: December 18, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Hiroki Kashiwagi