With Coupled Antenna Patents (Class 455/129)
  • Patent number: 8306485
    Abstract: A radiocommunications terminal includes a send circuit and a receive circuit connected to a send/receive antenna of the terminal and respectively defining, when in operation, a send mode and a receive mode. The terminal also includes a circuit in a common part of the connection of the send and receive circuits to the antenna for matching the send and receive circuits to the antenna. A device for controlling and monitoring the power of signals sent/received by the terminal decenters the impedance matching of the antenna of the terminal only when the device is in send mode. Applications include reducing the energy impinging on the user of a mobile radio communications terminal.
    Type: Grant
    Filed: October 4, 2001
    Date of Patent: November 6, 2012
    Assignee: Z124
    Inventors: Franck Greverie, Jacques Muller
  • Patent number: 8301092
    Abstract: Methods and systems for a low noise amplifier utilizing a leaky wave antenna are disclosed and may include one or more low-noise amplifiers (LNAs) coupled to one or more leaky wave antennas (LWAs) in a wireless device. RF signals may be received via one or more LNAs coupled to one or more feed points on a LWA. The one or more LNAs may be coupled to the feed points based on an impedance of the feed points and an input impedance of the one or more LNAs. The impedance of the feed points may be configured by locating them along a vertical axis in a resonant cavity of the LWA. The LWAs may be integrated on a chip, and/or on a package or printed circuit board to which the chip is affixed. The RF signals may be amplified by the LNAs and may be down-converted to baseband signals.
    Type: Grant
    Filed: December 30, 2009
    Date of Patent: October 30, 2012
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza Rofougaran, Maryam Rofougaran
  • Patent number: 8295783
    Abstract: A wireless device comprising a plurality of chips may be operable to dynamically configure wireless communication between the plurality of chips. Each of the chips may include one or more transceivers and one or more integrated directional antennas communicatively coupled to the one or more transceivers. The communications link between chips in the wireless device may be dynamically configured via control of the transceivers and/or the integrated directional antennas. The antennas may include patch antennas and/or dipole antennas. The transceivers may be configured by controlling output power of power amplifiers or by controlling gain of low noise amplifiers. The communications link may be dynamically configured by controlling a characteristic impedance of the antennas for impedance matching to transceivers. A frequency of the communication link may be controlled by configuring the antennas. A bandwidth of the communications link may be configured based on activity of processors in the wireless device.
    Type: Grant
    Filed: May 20, 2009
    Date of Patent: October 23, 2012
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza Rofougaran, Maryam Rofougaran
  • Patent number: 8295788
    Abstract: Methods and systems for an n-phase transmitter utilizing a leaky wave antenna (LWA) are disclosed and may include transmitting an n-phase wireless signal at a first frequency via the LWA utilizing a plurality of second frequency signals from one or more signal sources, and the second frequency may be lower than the first frequency. Each of the second frequency signals may be configured with a phase difference and may be communicated to the LWA utilizing one or more power amplifiers (PAs). The PAs may be operated in switching mode, thereby generating a square wave. The LWAs may be integrated on the chip, on a package to which the chip is affixed, and/or on a printed circuit board to which the chip is affixed. Square wave signals may be generated utilizing the signal sources. The transmitted wireless signal may be amplitude modulated utilizing a bias voltage applied to the LWAs.
    Type: Grant
    Filed: December 30, 2009
    Date of Patent: October 23, 2012
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza Rofougaran, Maryam Rofougaran
  • Patent number: 8290087
    Abstract: Transmitter comprising a delta-sigma modulator (DSM), a sample rate converter (SRC) situated downstream of the delta-sigma modulator with respect to a direction of transmission signal flow, and a switching amplifier (SA) situated downstream of the sample rate converter (SRC) with respect to the direction of transmission signal flow. The invention as defined above allows for a decoupling of the clock frequency of the delta-sigma modulator (DSM) and the carrier frequency, for example in radio frequency (RF) signal generation applications using delta-sigma modulators. With the invention described herein it is possible to design the delta-sigma modulator independently of the carrier frequency.
    Type: Grant
    Filed: October 21, 2008
    Date of Patent: October 16, 2012
    Assignee: Ubidyne, Inc.
    Inventors: Johannes Schlee, Maik Riegler
  • Patent number: 8285232
    Abstract: A multi-rank beamforming (MRBF) scheme in which the downlink channel is estimated and an optimal precoding matrix to be used by the MRBF transmitter is determined accordingly. The optimal precoding matrix is selected from a codebook of matrices having a recursive structure which allows for efficient computation of the optimal precoding matrix and corresponding Signal to Interference and Noise Ratio (SINR). The codebook also enjoys a small storage footprint. Due to the computational efficiency and modest memory requirements, the optimal precoding determination can be made at user equipment (UE) and communicated to a transmitting base station over a limited uplink channel for implementation over the downlink channel.
    Type: Grant
    Filed: May 19, 2011
    Date of Patent: October 9, 2012
    Assignee: NEC Laboratories America, Inc.
    Inventors: Mohammad A. Khojastepour, Narayan Prasad
  • Patent number: 8285231
    Abstract: Methods and systems for an integrated leaky wave antenna-based transmitter and on-chip power distribution are disclosed, and may include supplying one or more bias voltages and ground for a chip including a plurality of power amplifiers (PAs) utilizing bias voltage and ground lines. One or more leaky wave antennas (LWAs) may be communicatively coupled to the power amplifiers. Wireless signals may be transmitted utilizing the LWAs integrated in the lines in the chip. Radio frequency (RF) signals may be transmitted via the plurality of LWAs. The RF signals may include 60 GHz signals and the LWAs may include microstrip and/or coplanar waveguides. A cavity length of the LWAs may be configured by a spacing between conductive lines in the microstrip and/or coplanar waveguides. The LWAs may be configured to transmit the wireless signals at a desired angle from a surface of the chip.
    Type: Grant
    Filed: December 30, 2009
    Date of Patent: October 9, 2012
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza Rofougaran, Maryam Rofougaran
  • Patent number: 8285238
    Abstract: A compact receiver which is easy in adjustment of a reference signal level is provided. A receiver having an antenna for receiving a wireless signal, a single pole single through switch which passes a signal received via the aforesaid antenna and outputs the signal when a first control signal is in a first state, and connects a signal received via the aforesaid antenna to a reference potential when the first control signal is in a second state, and a difference circuit which outputs a difference signal of an output signal of the aforesaid single pole single through switch when the first control signal is in the first state and an output signal of the aforesaid single pole single through switch when the first control signal is in the second state is provided.
    Type: Grant
    Filed: December 31, 2007
    Date of Patent: October 9, 2012
    Assignee: Fujitsu Limited
    Inventor: Masaru Sato
  • Patent number: 8285226
    Abstract: A transmitting entity uses different steering vectors for different subbands to achieve steering diversity. Each steering vector defines or forms a beam for an associated subband. Any steering vector may be used for steering diversity. The steering vectors may be defined such that the beams vary in a continuous instead of abrupt manner across the subbands. This may be achieved by applying continuously changing phase shifts across the subbands for each transmit antenna. As an example, the phase shifts may change in a linear manner across the subbands for each transmit antenna, and each antenna may be associated with a different phase slope. The application of linearly changing phase shifts to modulation symbols in the frequency domain may be achieved by either delaying or circularly shifting the corresponding time-domain samples.
    Type: Grant
    Filed: February 24, 2005
    Date of Patent: October 9, 2012
    Assignee: Qualcomm Incorporated
    Inventors: Stein A. Lundby, Steven J. Howard, Jay Rodney Walton
  • Patent number: 8270924
    Abstract: There is an antenna diversity system for radio reception in moving vehicles which includes a receiver, and at least two antennas coupled to the receiver. These antennas transmit antenna feed signals to an antenna diversity module coupled between the receiver and the antennas. In at least one embodiment, the antenna diversity module comprises at least one evaluation circuit for evaluating an interference in a reception signal, and at least one processor for adjusting a magnitude and a phase angle of a linear combination of the antenna feed signals. The evaluation circuit reads and sends an interference indication signal to the processor to create a relatively low interference signal. Thus, the diversity module combines the antenna feed signals in an adjustable manner based on an magnitude of phase angle, to form a linear combined signal that is present at the output of the antenna diversity module as a reception signal.
    Type: Grant
    Filed: July 31, 2008
    Date of Patent: September 18, 2012
    Assignee: Delphi Delco Electronics Europe GmbH
    Inventors: Heinz Lindenmeier, Stefan Lindenmeier, Jochen Hopf, Leopold Reiter
  • Patent number: 8271060
    Abstract: An antenna device for a portable wireless terminal is provided. The antenna device includes a main antenna for mobile communication for transmitting and receiving signal in a first frequency band, a Transmit (Tx) sub-antenna for transmitting signals in a second frequency band, a Receive (Rx) sub-antenna for receiving signals in a third frequency band, and a controller for selectively using one of the Tx sub-antenna and the Rx sub-antenna if the second frequency band overlaps with the third frequency band, and for providing control such that the Tx sub-antenna and the Rx sub-antenna are simultaneously used if the second frequency band does not overlap with the third frequency band. Accordingly, without increasing the volume of the portable wireless terminal, an antenna space can be ensured and radiation performance can be improved.
    Type: Grant
    Filed: October 5, 2009
    Date of Patent: September 18, 2012
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Joo-Hwan Park, Oh-Yong Kwon, You-sung Lee
  • Patent number: 8270918
    Abstract: A multi-rank beamforming (MRBF) scheme in which the downlink channel is estimated and an optimal precoding matrix to be used by the MRBF transmitter is determined accordingly. The optimal precoding matrix is selected from a codebook of matrices having a recursive structure which allows for efficient computation of the optimal precoding matrix and corresponding Signal to Interference and Noise Ratio (SINR). The codebook also enjoys a small storage footprint. Due to the computational efficiency and modest memory requirements, the optimal precoding determination can be made at user equipment (UE) and communicated to a transmitting base station over a limited uplink channel for implementation over the downlink channel.
    Type: Grant
    Filed: October 6, 2011
    Date of Patent: September 18, 2012
    Assignee: NEC Laboratories America, Inc.
    Inventors: Mohammad Ali Khojastepour, Narayan Prasad
  • Patent number: 8254859
    Abstract: A multi-rank beamforming (MRBF) scheme in which the downlink channel is estimated and an optimal precoding matrix to be used by the MRBF transmitter is determined accordingly. The optimal precoding matrix is selected from a codebook of matrices having a recursive structure which allows for efficient computation of the optimal precoding matrix and corresponding Signal to Interference and Noise Ratio (SINR). The codebook also enjoys a small storage footprint. Due to the computational efficiency and modest memory requirements, the optimal precoding determination can be made at user equipment (UE) and communicated to a transmitting base station over a limited uplink channel for implementation over the downlink channel.
    Type: Grant
    Filed: May 19, 2011
    Date of Patent: August 28, 2012
    Assignee: NEC Laboratories America, Inc.
    Inventors: Mohammad A. Khojastepour, Narayan Prasad
  • Patent number: 8249532
    Abstract: The present invention provides a radio communication apparatus for use with a host system. The host system includes an electromagnetic body which acts as a ground plane or counterpoise for the radio communication apparatus. The apparatus comprises an electronics system coupled to the host system, a radio module including a radio electromagnetic body and optionally a radio electronics system, a signal pathway operatively coupling the electronics system with the radio module, and a conductive enclosure. The conductive enclosure provides electromagnetic isolation of the signal pathway. The conductive enclosure is further configured, by inclusion of a wave trap, to impede electromagnetic coupling between the radio electromagnetic body and the host electromagnetic body via the conductive enclosure.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: August 21, 2012
    Assignee: Sierra Wireless, Inc.
    Inventors: Paul A. Nysen, Chih-Chuan Yen
  • Publication number: 20120208479
    Abstract: The energy self-sufficient radiofrequency transmitter has at least one electromechanical transducer with a rectifier circuit connected downstream and with a voltage converter circuit. A logic circuit configuration is connected to the voltage converter circuit. The logic circuit configuration has a sequence controller a memory in which an identification code is stored. The energy self-sufficient radiofrequency transmitter also has a radiofrequency transmission stage that is connected to the logic circuit configuration and a transmission antenna.
    Type: Application
    Filed: April 26, 2012
    Publication date: August 16, 2012
    Inventors: Klaus Pistor, Frank Schmidt
  • Patent number: 8244189
    Abstract: A wireless device comprising a plurality of chips may be operable to communicate wireless signals via a mesh network comprising a plurality of integrated directional antennas on the plurality of chips. Wireless signals may be communicated between the plurality of the chips and/or with devices external to the wireless device via the mesh network. Beam-formed wireless signals may be communicated via the plurality of integrated directional antennas. The plurality of chips may be integrated on a single package or on a plurality of packages, which may comprise one or more circuit boards. Wireless signals may be communicated with devices external to the single package via the mesh network. The directional antennas may comprise patch antennas and/or dipole antennas.
    Type: Grant
    Filed: May 20, 2009
    Date of Patent: August 14, 2012
    Assignee: Broadcom Corporation
    Inventors: Ahmadreza Rofougaran, Maryam Rofougaran
  • Patent number: 8238854
    Abstract: A multi-rank beamforming (MRBF) scheme in which the downlink channel is estimated and an optimal precoding matrix to be used by the MRBF transmitter is determined accordingly. The optimal precoding matrix is selected from a codebook of matrices having a recursive structure which allows for efficient computation of the optimal precoding matrix and corresponding Signal to Interference and Noise Ratio (SINR). The codebook also enjoys a small storage footprint. Due to the computational efficiency and modest memory requirements, the optimal precoding determination can be made at user equipment (UE) and communicated to a transmitting base station over a limited uplink channel for implementation over the downlink channel.
    Type: Grant
    Filed: May 19, 2011
    Date of Patent: August 7, 2012
    Assignee: NEC Laboratories America, Inc.
    Inventors: Mohammad A. Khojastepour, Narayan Prasad
  • Patent number: 8237587
    Abstract: A continuously-arranged sensor system is provided that can eliminate a shift in timing between a determination signal of each sensor unit and sensor information relating to the determination signal. The continuously-arranged sensor system includes a network unit and a plurality of sensor units, which are connected by a serial transmission line and a parallel transmission line. In accordance with a command sent from the network unit, each sensor unit transmits the determination signal and the sensor information, provided at the same time as the determination signal, to the network unit via the serial transmission line. Therefore, the network unit can obtain the determination signal and the sensor information exhibited at the same time.
    Type: Grant
    Filed: December 16, 2009
    Date of Patent: August 7, 2012
    Assignee: Keyence Corporation
    Inventor: Koji Fukumura
  • Patent number: 8233861
    Abstract: A system for transmitting a broadband signal over an electrically short antenna which includes a plurality of switched impedance synthesis transmit antenna matching circuits which are dynamically controlled with knowledge of the transmitting broadband signal to match the dynamic impedance of the electrically short antenna during transmission.
    Type: Grant
    Filed: September 24, 2008
    Date of Patent: July 31, 2012
    Assignee: Rockwell Collins, Inc.
    Inventors: David W. Cripe, Scott L. Patten, Jeremiah D. Wolf, James B. West
  • Publication number: 20120184232
    Abstract: Disclosed is a method for selecting a source transmit antenna in a cooperative multiple-input and multiple-output (MIMO) communication system including a source node, a relay node and a destination node. The method includes determining a source transmit antenna selection metric such that a source-destination channel, a source-relay channel and a relay-destination channel are related to one another, and selecting a positive integer number of antennas such that the source transmit antenna selection metric is maximized.
    Type: Application
    Filed: November 11, 2011
    Publication date: July 19, 2012
    Applicant: Dongguk University Industry-Academic Cooperation Foundation
    Inventors: Dae Woon Lim, Dong-Joon Shin, Jong-Seon No, Xianglan Jin
  • Publication number: 20120184231
    Abstract: The mobile wireless communications device includes a printed circuit board (PCB), wireless transceiver circuitry carried by the PCB and operating on a plurality of frequency bands, at least one antenna, and a multi-bandpass transmission line coupling the wireless transceiver circuitry to the at least one antenna. The multi-bandpass transmission line includes an electrically conductive trace on a surface of the PCB defining a transmission line signal path, and an electrically conductive layer on an opposite surface of the PCB and defining a ground plane. The electrically conductive layer has at least one set of slot rings therein and defining a plurality of slot ring resonators being electromagnetically coupled to the transmission line signal path and operable at the plurality of frequency bands.
    Type: Application
    Filed: January 19, 2011
    Publication date: July 19, 2012
    Applicant: Research In Motion Limited
    Inventors: Dajun CHENG, Nitin Shali, Raman Sharma
  • Patent number: 8224271
    Abstract: An electronic device (200,300) comprising an antenna arrangement with first and second antenna groups with first (122, 142) and a second (124, 144) radiation elements. The first and second radiation elements in each group have first and second respective polarizations and gain, and said groups also comprise a beam forming network (126, 146) connected to the radiation elements of the group and to an output selector (150). The beam forming network (126, 146) of each antenna group uses the radiation elements (122, 124; 142, 144) in the group to create a radiation pattern (127, 147) with a polarization which is a composite of the first and second polarizations of the elements in the group, so that a first (127) and a second (147) radiation pattern of composite polarization is created. The output selector (150) selects or combines signals received by the two antenna groups as its output.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: July 17, 2012
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Patrik Persson, Martin Nils Johansson, Anders Stjernman, Sven Anders Gösta Derneryd, Jonas Fridén
  • Patent number: 8219045
    Abstract: A system (100) and method (300) of feedback transmitter power control can include a transmitter temperature detector such as a thermistor based temperature detector (118), a detector for detecting forward and reflected transmitter power (113 and 115), and a voltage controlled attenuator (120) placed in a radio frequency power control feedback path for modifying transmitter power based on a detected transmitter temperature and a detected forward and reflected transmitter power. The system can further include a logarithmic amplifier controller (122) in the feedback path coupled to the voltage controlled attenuator as well as a power amplifier (112) coupled to the voltage controlled attenuator. The system can operate in both analog and time division multiple access modes. The system can be active in real time throughout a push-to-talk session.
    Type: Grant
    Filed: June 27, 2006
    Date of Patent: July 10, 2012
    Assignee: Motorola Soultions, Inc.
    Inventor: Mark W. Stralko
  • Patent number: 8208882
    Abstract: An antenna sense circuit includes a detector and a level shifter. The detector consists of a voltage drop component, a transistor component, a first resistor component, and a second resistor component. The voltage drop component is coupled between a first power supply and a first terminal of the first resistor component. The second resistor component has a first terminal coupled to a second terminal of the first resistor component and a second terminal coupled to a second power supply. The transistor component has a control terminal coupled to the second terminal of the first resistor component and the first terminal of the second resistor component, a second connection terminal coupled to the first power supply, and a first connection terminal for outputting a first detecting signal. The level shifter adjusts a voltage level of the first detecting signal to generate a second detecting signal.
    Type: Grant
    Filed: November 5, 2009
    Date of Patent: June 26, 2012
    Assignee: Wistron NeWeb Corporation
    Inventors: Chen-An Hsieh, Cheng-Hsiung Hsu, Tsai-Wang Chang
  • Publication number: 20120155344
    Abstract: Exemplary embodiments are directed to communication with a wireless power transmitter. A device may include an antenna for wirelessly transmitting a power carrier. The device may further include transmit circuitry coupled to the antenna and configured to transmit a data carrier at a frequency corresponding to at least one harmonic of the power carrier.
    Type: Application
    Filed: August 18, 2011
    Publication date: June 21, 2012
    Applicant: QUALCOMM Incorporated
    Inventors: George A. Wiley, Zhen Ning Low
  • Publication number: 20120157024
    Abstract: A technique is proposed for reducing leakage electromagnetic field that reduces the electromagnetic leakage from a connection point between a communication coupler and a signal transmission apparatus and that can conduct both communication and transmission of electric power. The signal transmission apparatus includes: a first sheet conductive body portion constituting a lower portion electrode; and a second sheet conductive body portion in a mesh shape which is laminated on the first sheet conductive body portion while a gap area is sandwiched therebetween and which includes an uneven mesh size area on which a sheet impedance is continuously changed.
    Type: Application
    Filed: September 1, 2010
    Publication date: June 21, 2012
    Applicant: NEC CORPORATION
    Inventors: Tsuneo Tsukagoshi, Naoki Kobayashi, Hiroshi Fukuda, Koichiro Nakase
  • Publication number: 20120152300
    Abstract: An apparatus includes terminals configured to be coupled to a string wiring of a photovoltaic string. The apparatus also includes a power controller configured to control a power provided over the string wiring by a photovoltaic panel in the photovoltaic string. The apparatus further includes a wireless radio configured to at least one of transmit and receive wireless signals using the string wiring as an antenna. The wireless signals contain data associated with the photovoltaic panel and/or the power controller. For example, the wireless radio could be configured to receive a first signal containing a command for the power controller from the string wiring and to provide the command to the power controller. The wireless radio could also be configured to receive an acknowledgement associated with the command from the power controller and to transmit a second signal containing the acknowledgement over the string wiring for wireless transmission.
    Type: Application
    Filed: December 15, 2010
    Publication date: June 21, 2012
    Applicant: National Semiconductor Corporation
    Inventors: Lawrence H. Zuckerman, Perry I. Tsao, Robert W. Smith
  • Publication number: 20120157023
    Abstract: An active antenna system comprises a coupling block adapted to sample a portion of a first telecommunication signal and a compensation block. The compensation block is coupled to the coupling block and is adapted to apply at least a phase compensation to the portion of the first telecommunication signal, thereby obtaining a first compensation signal.
    Type: Application
    Filed: December 20, 2010
    Publication date: June 21, 2012
    Inventor: Peter Kenington
  • Patent number: 8204453
    Abstract: A method, an apparatus and a communication unit for generating preceding feedback information in a multiple frequency radio transmission system are disclosed. A rank for preceding matrices, wherein the rank is constant over the multiple frequencies, is selected and a plurality of preceding matrices having the selected rank are selected. A different preceding matrix is selected for each frequency subset of the multiple frequencies.
    Type: Grant
    Filed: August 20, 2008
    Date of Patent: June 19, 2012
    Assignee: Intel Mobile Communications GmbH
    Inventor: Frank Dietrich
  • Patent number: 8204446
    Abstract: Embodiments include antenna tuning systems and methods of tuning an antenna of a wireless device with an antenna, a circuit with at least one tunable component, and a processing system. The processing system determines tuning selection inputs during a communication session. Based on the tuning selection inputs, the processing system determines one or more component values for one or more tunable components. In an embodiment, the component value(s) are determined from a set of pre-defined component values. The tunable component(s) are controlled to have the determined component value(s). The circuit may be an impedance matching circuit that includes at least one tunable reactive component. Alternatively, the circuit may be an antenna tuning circuit that includes at least one variable component. In an embodiment, both an impedance matching circuit and an antenna tuning circuit may be implemented, with each type of circuit having one or more tunable components.
    Type: Grant
    Filed: October 29, 2009
    Date of Patent: June 19, 2012
    Assignee: Motorola Mobility, Inc.
    Inventors: Roger Scheer, Eric Krenz, Istvan Szini
  • Publication number: 20120140842
    Abstract: Certain aspects of the present disclosure relate to techniques that may be used to help control aspects of beamforming by a beamformee. According to certain aspects, a beamformee may be able to signal, to a beamformer, a maximum number of transmit spatial streams to use for single-user beamformed transmissions.
    Type: Application
    Filed: December 5, 2011
    Publication date: June 7, 2012
    Applicant: QUALCOMM INCORPORATED
    Inventors: Sameer Vermani, Albert Van Zelst, Hemanth Sampath, Didier Johannes Richard Van Nee, Santosh Paul Abraham
  • Patent number: 8190110
    Abstract: According to one embodiment, a power combiner configured to receive at least two input signals and combine the input signals to generate an output signal. The power combiner may include at least two input layers and an output layer located between the input layers. Each layer may be in the shape of a slotted loop.
    Type: Grant
    Filed: February 2, 2009
    Date of Patent: May 29, 2012
    Assignee: Fujitsu Semiconductor Limited
    Inventor: Chee Hong Lai
  • Patent number: 8190109
    Abstract: Real-time calibration of a tunable matching network that matches the dynamic impedance of an antenna in a radio frequency transmitter system. The radio frequency transmitter system includes two non-linear equations that may be solved to determine the reflection coefficient of the antenna. The tunable matching network is repeatedly perturbed and the power reflected by the antenna is measured after each perturbation at the same node within the tunable matching network. The power values are used by an optimizer in converging to a solution that provides input impedance of the antenna. The elements of the matching circuit are adjusted to match the input impedance of the antenna.
    Type: Grant
    Filed: October 14, 2009
    Date of Patent: May 29, 2012
    Assignee: Research In Motion Limited
    Inventors: Shirook Ali, James Paul Warden, Mohamed Bakr
  • Patent number: 8180183
    Abstract: An RF photonic link having at least one light source, at least one photodetector, multiple optoelectronic modulators, and an RF waveguide common to each one of said multiple optoelectronic modulators. The multiple optoelectronic modulators are optically arranged in parallel to receive light from said at least one light source and are disposed in said RF waveguide. The RF waveguide, in use, guides an RF electromagnetic field applied to each of the multiple optoelectronic modulators disposed therein, the RF electromagnetic field propagating through the RF waveguide in a direction that is perpendicular to a direction in which an optical field propagates through each of said optoelectronic modulators.
    Type: Grant
    Filed: July 18, 2008
    Date of Patent: May 15, 2012
    Assignee: HRL Laboratories, LLC
    Inventor: Daniel Yap
  • Publication number: 20120113874
    Abstract: An electronic device has wireless communications circuitry that includes transmitters and receivers. The transmitters and receivers may share an antenna. Transmitted signals from multiple transmitters may be merged using a combining circuit. Merged signals from the transmitter may be conveyed to the antenna through a circulator. The circulator may route incoming signals from the antenna to receivers. The receivers may be coupled to the circulator through a filter. An additional filter may be interposed between the circulator and the antenna. An additional transmitter may transmit signals through the antenna using the additional filter. An additional receiver may receive some of the incoming signals that are received by the antenna through the additional filter.
    Type: Application
    Filed: November 9, 2010
    Publication date: May 10, 2012
    Inventor: Louie J. Sanguinetti
  • Publication number: 20120105248
    Abstract: Aspects and embodiments of the present invention provide a system for obtaining, processing and managing data from an implanted sensor. In some embodiments, a patient or other persons can use a flexible antenna to obtain data from the implanted sensor. The flexible antenna includes at least one transmit loop and at least one receive loop. The transmit loop is adapted to propagate energizing signals to the implanted sensor. The receive loop is adapted to detect a response signal from the implanted sensor. The transmit loop includes a capacitor formed by a discontinuous area. The capacitor is adapted to allow the loop to be tuned. The flexible antenna can communicate with a patient device that collects the data from the implanted sensor, creates a data file and transmits the data file to a remote server over a network. A physician or other authorized person may access the remote server using an access device.
    Type: Application
    Filed: January 4, 2012
    Publication date: May 3, 2012
    Applicant: CardioMEMS, Inc.
    Inventors: Donald J. Miller, Kim Rutkowski, Jason Kroh, Shawn Michael Brogdon, Erik Moore
  • Patent number: 8170503
    Abstract: Provided are an apparatus and method for transmitting data and an apparatus and method for receiving data, in which beam forming is performed in consideration of the communication capabilities of antennas of stations that perform directional communication in a high-frequency band.
    Type: Grant
    Filed: April 16, 2008
    Date of Patent: May 1, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ji-Sung Oh, Seong-Soo Kim, Chang-Yeul Kwon, Jae-Hwa Kim
  • Patent number: 8170510
    Abstract: Disclosed herein are techniques, systems, and methods relating to minimizing mutual coupling between a first antenna and a second antenna.
    Type: Grant
    Filed: May 29, 2009
    Date of Patent: May 1, 2012
    Assignee: Intel Mobile Communications GmbH
    Inventors: Mikael Bergholz Knudsen, Bernd Adler, Peter Bundgaard, Jan-Erik Mueller, Gert F Pedersen, Mauro Pelosi
  • Patent number: 8165543
    Abstract: One or more beamsteering matrices are applied to a plurality of signals to be transmitted via multiple antennas. The plurality of signals are provided to a plurality of power amplifiers coupled to the multiple antennas after applying the one or more beamsteering matrices to the plurality of signals. Signal energies are determined for the plurality of signals provided to the plurality of power amplifiers, and output power levels of the plurality of power amplifiers are adjusted based on the determined signal energies.
    Type: Grant
    Filed: April 24, 2008
    Date of Patent: April 24, 2012
    Assignee: Marvell World Trade Ltd.
    Inventors: Nabar U. Rohit, Hongyuan Zhang
  • Patent number: 8165551
    Abstract: A multi-band antenna is adapted for disposing on a substrate with a ground plane and a matching circuit disposed thereon, and includes a feed-in section, a coupling section, a grounding section, a multiple-bend arm, and a conductor section. The feed-in section is connected electrically to the matching circuit. The coupling section is connected electrically to the feed-in section and is disposed spacedly from the ground plane. The grounding section is connected electrically to the ground plane. The multiple-bend arm is connected electrically to the coupling section and the grounding section and cooperates with the grounding section to form a signal path for signals in a first frequency band. The conductor section is connected electrically to the multiple-bend arm and cooperates with a portion of the multiple-bend arm to form a signal path for signals in a second frequency band.
    Type: Grant
    Filed: September 16, 2010
    Date of Patent: April 24, 2012
    Assignee: Quanta Computer Inc.
    Inventors: Chieh-Ping Chiu, Feng-Jen Weng, Hsiao-Wei Wu, I-Ping Yen
  • Patent number: 8160492
    Abstract: A wireless communication device having extremely simple constitution is used, and a low-cost and low power consumption wireless network system with high-quality signals is provided. The wireless network system comprises a plurality of wireless communication devices (101) each comprising a radiating oscillator (1) configured to integrate a transistor into a microwave oscillating resonator to generate a negative resistance and to commonly use a function of an antenna (11), an intermediate frequency signal generating section (4) and a receiving signal detecting section (7).
    Type: Grant
    Filed: March 30, 2007
    Date of Patent: April 17, 2012
    Assignee: National Institute of Information and Communications Technology
    Inventors: Toshiaki Matsui, Hitoshi Utagawa
  • Patent number: 8155607
    Abstract: An antenna apparatus of a portable terminal and method for implementing characteristics of the antenna apparatus of the portable terminal are disclosed. The antenna apparatus includes a circuit board including a power feeder and a ground, a radiation unit, a power feeder connecting unit for electrically connecting the power feeder to the radiation unit and for feeding electric power to the radiation unit, and a ground connecting unit including at least two paths which have different lengths for electrically connecting the ground to and disconnecting the ground from the radiation unit selectively.
    Type: Grant
    Filed: April 23, 2009
    Date of Patent: April 10, 2012
    Assignee: Samsung Electronics Co., Ltd
    Inventor: Hyung Rak Kim
  • Patent number: 8150451
    Abstract: A portable terminal is capable of enhancing a Hearing Aid Compatibility (HAC) rating by having an arrangement to shift a peak region of an electromagnetic field occurring at the time of a wireless communication in a call mode, to a position far from a measuring region.
    Type: Grant
    Filed: November 12, 2008
    Date of Patent: April 3, 2012
    Assignee: LG Electronics Inc.
    Inventors: Chang-Il Kim, Hyun-Seock Song, Jae-Gon Lee
  • Patent number: 8149087
    Abstract: A device for hands-free locking/unlocking of doors/windows of a vehicle implements at least two modes of operation: an approach-detection mode D and a tracking mode P. At least two antennas 14a, 14b are respectively coupled to amplifiers 12a, 12b that are active in tracking mode P. In approach-detection mode D the antennas are decoupled from the amplifiers used in mode P and coupled to an additional amplifier 12c that is active in mode D. Preferably, elements are provided to reduce the consumption of the amplifiers when the device is in a mode of operation where they are inactive.
    Type: Grant
    Filed: April 16, 2007
    Date of Patent: April 3, 2012
    Assignee: Continental Automotive France
    Inventor: Alain Brillon
  • Patent number: 8145181
    Abstract: An electric power transmission system for communications includes on/off switches; high-voltage power assemblies; groups of high-voltage devices each being powered by the high-voltage power assembly; a carrier waves communications network comprising a transformer and filter, a filter, and a carrier waves coupling device interconnecting the transformer and filter and the filter, wherein the transformer and filter includes a low-voltage power assembly for communications and the filter includes a high-voltage power assembly for communications; and low and high-voltage devices. Data can be communicated between the low-voltage devices, between the high-voltage devices, or between the low-voltage device and the high-voltage device by transmitting carrier waves over the AC power.
    Type: Grant
    Filed: October 21, 2008
    Date of Patent: March 27, 2012
    Inventor: Ming-Wei Lu
  • Publication number: 20120071121
    Abstract: A magnetic communication system utilizing a multi-conductor transmit antenna is provided. Each of the conductors is supplied with an identical signal such that the magnetic fields generated by each conductor add together to create a like signal having an increased strength. Individual energy barriers are operatively connected to each conductor element in order to limit the current supplied to each conductor to intrinsically safe levels.
    Type: Application
    Filed: September 22, 2010
    Publication date: March 22, 2012
    Applicant: Lockheed Martin Corporation
    Inventor: David LeVan
  • Patent number: 8139678
    Abstract: Closed loop multiple-antenna wireless communications system with antenna weights determined by maximizing a composite channel signal-to-interference-plus-noise ratio minimum. Multiplexed symbol streams over subsets of antennas enhance throughout.
    Type: Grant
    Filed: December 16, 2010
    Date of Patent: March 20, 2012
    Assignee: Texas Instruments Incorporated
    Inventors: Eko Onggosanusi, Anand G. Dabak, Timothy M. Schmidl
  • Publication number: 20120050236
    Abstract: This disclosure provides implementations of electromechanical systems resonator structures, devices, apparatus, systems, and related processes. In one aspect, a contour mode resonator device includes a first conductive layer with a plurality of first layer electrodes including a first electrode at which a first input signal can be provided and a second electrode at which a first output signal can be provided. A second conductive layer includes a plurality of second layer electrodes including a first electrode proximate the first electrode of the first conductive layer and a second electrode proximate the second electrode of the first conductive layer. A second signal can be provided at the first electrode or the second electrode of the second conductive layer to cooperate with the first input signal or the first output signal to define a differential signal. A piezoelectric layer is disposed between the first conductive layer and the second conductive layer.
    Type: Application
    Filed: April 26, 2011
    Publication date: March 1, 2012
    Applicant: QUALCOMM MEMS TECHNOLOGIES, INC.
    Inventors: Chi Shun Lo, Jonghae Kim, Sang-June Park, Sanghoon Joo, Chengjie Zuo, Changhan Yun
  • Patent number: 8126407
    Abstract: A transmitter circuit. One embodiment provides for emitting electromagnetic waves. The circuit has a transmitting device for outputting a transmission signal, an antenna device for emitting the transmission signal in the form of an electromagnetic wave, and a matching device which is electrically connected to the transmitting device and to the antenna device. The matching device includes at least two tuning elements for setting the resonant frequency of a circuit arrangement, formed from the antenna device and the first and second tuning elements, and for matching the impedance of the transmitting device and the antenna device.
    Type: Grant
    Filed: February 15, 2008
    Date of Patent: February 28, 2012
    Assignee: Infineon Technologies AG
    Inventors: Jakob Jongsma, Vjekoslav Matic
  • Patent number: 8126515
    Abstract: The semiconductor integrated circuit includes: a pair of antenna terminals; a rectifier; a source-voltage terminal; a shunt regulator; a series regulator. When the voltage of the inside source line rises to or above a first set voltage, the shunt regulator passes a pull-down current through a pull-down transistor. When the voltage of the inside source line drops to or below the second set voltage, the series regulator passes a pull-up current through a pull-up transistor. The first set voltage is set to be higher than the second set voltage in voltage level. With the semiconductor integrated circuit, the competition of actions of the two regulators is prevented. The semiconductor integrated circuit is arranged to work in contact and noncontact operation modes, and a stable source voltage can be supplied to an internal circuit thereof.
    Type: Grant
    Filed: December 3, 2009
    Date of Patent: February 28, 2012
    Assignee: Renesas Electronics Corporation
    Inventors: Kazuki Watanabe, Hisataka Tsunoda