Waveguide Patents (Class 455/81)
  • Patent number: 9184697
    Abstract: An oscillation device comprises a substrate and a plurality of resonance structures arranged on the substrate to resonate electromagnetic waves. Each of the plurality of resonance structures has a negative differential resistance device for generating electromagnetic waves, a first conductor arranged electrically in contact with the negative differential resistance device and a second conductor arranged electrically in contact with the negative differential resistance device and disposed on the opposite side to the first conductor with respect to the negative differential resistance device. Adjacently located resonance structures of the plurality of resonance structures are interconnected by means of a metal part adapted for capacitive coupling with the first conductors thereof. The plurality of resonance structures are arranged so as to be separated from each other at least by a distance not greater than a wavelength of electromagnetic waves to be oscillated by them.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: November 10, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Ryota Sekiguchi, Yasushi Koyama
  • Patent number: 8907680
    Abstract: A voltage detector for detecting a voltage generated in a second resonant coil that is disposed to face a first resonant coil and that performs at least one of electric power transmission and electric power reception to and from the first resonant coil in a contactless manner by means of electromagnetic resonance includes: a first high-impedance element having one end connected to one end of the second resonant coil; a second high-impedance element having one end connected to the other end of the second resonant coil; a low-impedance element connected between the other end of the first high-impedance element and the other end of the second high-impedance element and having an impedance smaller than each of those of the first and second high-impedance elements; and an output terminal for outputting a signal associated with a voltage applied across the low-impedance element.
    Type: Grant
    Filed: May 27, 2010
    Date of Patent: December 9, 2014
    Assignees: Nippon Soken, Inc., Toyota Jidosha Kabushiki Kaisha
    Inventors: Hiroyuki Sakakibara, Shinji Ichikawa
  • Patent number: 8909170
    Abstract: A radio transceiver device includes circuitry for radiating electromagnetic signals at a very high radio frequency both through space, as well as through wave guides that are formed within a substrate material. In one embodiment, the substrate comprises a dielectric substrate formed within a board, for example, a printed circuit board. In another embodiment of the invention, the wave guide is formed within a die of an integrated circuit radio transceiver. A plurality of transceivers with different functionality is defined. Substrate transceivers are operable to transmit through the wave guides, while local transceivers are operable to produce very short range wireless transmissions through space. A third and final transceiver is a typical wireless transceiver for communication with remote (non-local to the device) transceivers.
    Type: Grant
    Filed: June 2, 2009
    Date of Patent: December 9, 2014
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Patent number: 8868006
    Abstract: A bi-directional signal interface includes a first waveguide that propagates a first traveling wave. The first waveguide has one end that is coupled to a RF input port that receives a RF transmission signal and another end that is coupled to a RF bi-directional port that receives a RF reception signal and that transmits the RF transmission signal. A second waveguide is positioned proximate to the first waveguide. The second waveguide has one end that is coupled to an output port that passes the received RF reception signal. A non-reciprocal coupler couples fields from the first waveguide to the second waveguide so that the RF reception signal from the bi-directional port couples from the first waveguide to the second waveguide in a substantially non-reciprocal manner and then passes through the output port, and the RF transmission signal from the RF input port passes through the first waveguide to the RF bi-directional port.
    Type: Grant
    Filed: May 22, 2009
    Date of Patent: October 21, 2014
    Assignee: Photonic Systems, Inc.
    Inventors: Charles Cox, Edward Ackerman
  • Patent number: 8838045
    Abstract: Embodiments disclosed herein relate to programmable duplexers. The frequency pass band of the programmable duplexer is changed according to a selection of a channel-pair selection to control or maximize the transition band between the receiver path and the transmitter path. The programmable duplexer permits selections of desired pass bands without the need for multiple duplexer filters. As an additional advantage, the transmission band requirements become less sensitive to manufacturing tolerances and temperature variations.
    Type: Grant
    Filed: December 3, 2010
    Date of Patent: September 16, 2014
    Assignee: RF Micro Devices, Inc.
    Inventors: Joshua J. Caron, Julio Costa, Todd Gillenwater
  • Patent number: 8798556
    Abstract: According to one embodiment, a coupler for transmitting and receiving electromagnetic wave by electromagnetic coupling between the coupler and another, includes a line-shaped coupling element including a first open end and a second open end, a ground plane, a feeding element connecting the coupling element and a feed point, and a short circuiting element connecting the feeding element and the ground plane. The feeding element includes a first end connected to an intermediate portion between the first open end and the second open end of the coupling element, and a second end connected to the feed point. The short circuiting element includes a third end arranged between the first end of the feeding element and the second end of the feeding element, and a fourth end connected to the ground plane.
    Type: Grant
    Filed: June 15, 2011
    Date of Patent: August 5, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Hiroshi Shimasaki
  • Patent number: 8634866
    Abstract: A signal coupler for coupling wireless signals out of and into a waveguide system is described. The signal coupler includes an input output connector, an outer conductor coupled to the input output connector, and a radiator section, wherein the radiator section is configured to rotate about a center axis of the outer conductor. A wireless distribution system, including a waveguide with a hollow cross-sectional structure and a signal coupling device, is also described. A wireless distribution system, including a waveguide with a hollow cross-sectional structure and a plurality of signal coupling devices, is also described. A method of operating a wireless distribution system is also described. The method includes providing a wireless distribution system and inserting a first group of wireless signals in a preselected bandwidth into the waveguide.
    Type: Grant
    Filed: June 8, 2011
    Date of Patent: January 21, 2014
    Assignee: Wireless Expressways Inc.
    Inventor: Charles D. Becker
  • Patent number: 8611831
    Abstract: Numeric values “a” representing a respective order of transmission by a plurality of transmitting units, and a numeric value N representing the total number of transmitting units, are set for each of the transmitting units. At startup, a transmitting unit for which the value “a” representing the order of transmission of the unit has been set to 1 sets a trigger value to N and transmits information about the value “a” of the unit and detection information from a sensor, and, when the value N is detected from a received signal, transmits the value “a” of the unit and detection information. When a value of a?1 is detected from a received signal, the transmitting unit for which the value “a” representing the order of transmission of the unit has been set to other than 1 transmits the information of the value “a” of the unit and detection information.
    Type: Grant
    Filed: July 14, 2011
    Date of Patent: December 17, 2013
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Koji Nakatani, Shu Yamada, Sigeki Sakakibara, Michito Kaneko
  • Patent number: 8452240
    Abstract: There is provided a radio communication device that includes a plurality of leaky coaxial cables that transmit and receive radio signals, a detection unit that detects a difference in reception timing of a radio signal transmitted from another radio communication device among the plurality of leaky coaxial cables, and a transmission timing adjustment unit that adjusts transmission timing of radio signals to be respectively transmitted from the plurality of leaky coaxial cables based on the difference in the reception timing detected by the detection unit.
    Type: Grant
    Filed: September 16, 2010
    Date of Patent: May 28, 2013
    Assignee: Sony Corporation
    Inventor: Hiroaki Takahashi
  • 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: 8340594
    Abstract: A microwave channel multiplexing device comprises several elementary filters connected in parallel with a common output port by way of a transverse waveguide, each filter comprising a lower end fixed to a support common to all the filters and an upper end away from the support, an external peripheral wall, at least one internal cavity defining an internal channel, a signal input connected to the internal cavity and a signal output connected to the transverse waveguide. The multiplexing device furthermore comprises a conducto-radiative device coupled mechanically and thermally to at least two filters, the conducto-radiative device comprising at least one thermally conducting plate, and linked to the external peripheral walls of each of said at least two filters, the plate being fixed at the level of the upper end of the filters. The invention applies to the field of satellite telecommunications and more particularly to signals repetition devices aboard satellites.
    Type: Grant
    Filed: August 29, 2010
    Date of Patent: December 25, 2012
    Assignee: Thales
    Inventors: Joël Lagorsse, Jean-Claude Lacombe
  • Patent number: 8280316
    Abstract: In a wireless transmitting/receiving device of TDD system etc., a transmission signal is detected on the transmitting side in a specified transmission period, a signal reflected from an antenna through a circulator is detected on the receiving side in the transmission period and a reception signal is detected on the receiving side in a specified reception period. In this case, in a part of the transmission period a transmission signal having been detected on the transmitting side is selected while in the remaining part of the transmission period a reflection signal having been detected on the receiving side through a circulator from an antenna is selected, and in the reception period a reception signal having been detected on the receiving side through the circulator from the antenna is selected and outputted.
    Type: Grant
    Filed: February 1, 2010
    Date of Patent: October 2, 2012
    Assignee: Fujitsu Limited
    Inventors: Yoichi Endo, Hideyuki Kannari
  • Patent number: 8254983
    Abstract: A communication device has a plurality of circuit modules including a processing module, a memory module and a wireless telephony transceiver for communicating with a network in accordance with a wireless telephony protocol. An RF data bus communicates first data between at least two of the plurality of circuit modules over a first millimeter wave communication path.
    Type: Grant
    Filed: July 31, 2007
    Date of Patent: August 28, 2012
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Patent number: 8175013
    Abstract: Disclosed is a radio frequency (RF) switch including: a circulator having first to third nodes, which are connected to first to third ports, respectively; and a slot line pattern unit installed in a connection line between the third node of the circulator and the third port so as to carry out signal transmission or interception, wherein the slot line pattern unit includes a switching circuit, which is installed at a predetermined location so as to transmit or intercept a signal by maintaining or short-circuiting a gap of a slot line corresponding to the installed location according to an external switching control signal.
    Type: Grant
    Filed: December 22, 2006
    Date of Patent: May 8, 2012
    Assignee: KMW Inc.
    Inventors: Young-Chan Moon, Kang-Hyun Lee
  • Patent number: 8170497
    Abstract: An integrated circuit (IC) includes a die and a package substrate. The die includes circuit modules and an RF bus transceiver module and the package substrate includes a micro-electromechanical (MEM) area. The RF bus transceiver module includes a baseband processing module, a transmitter section, a receiver section, a transformer, an impedance matching circuit, and a transmission line. At least one of the transformer, the impedance matching circuit, and the transmission line is within the MEM area.
    Type: Grant
    Filed: October 5, 2009
    Date of Patent: May 1, 2012
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Patent number: 8140113
    Abstract: An integrated circuit transmission system includes a dielectric substrate wave guide and first and second substrate antennas. A substrate transmitter is operable to produce an radio frequency (RF) signal, the RF signal having first and second components. A micro-strip resonator filter module generates a filtered RF signal by adjusting phases of the first and second components of the RF signal via selection of one of a plurality of selectable tap points. A third substrate antenna generates a beam formed signal for transmission through the dielectric substrate wave guide, wherein the beam form signal is directed, via the filtered RF signal, to either the first substrate antenna or the second substrate antenna.
    Type: Grant
    Filed: January 21, 2011
    Date of Patent: March 20, 2012
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Patent number: 8103221
    Abstract: A CMOS monolithic transmit/receive switch comprises a single pole double throw switch (SPDT) module operable to selectively connect an antenna port to either a transmit port or to a receive port. A transmit matching network comprising a first transmission line matches the impedance of the transmit port of the SPDT module to a transmit impedance, and a first shunt transistor is operable to selectively ground a transmitter end of the first transmission line. A receive matching network comprising a second transmission line matches the impedance of the receive port of the SPDT module to a receive impedance, and a second shunt transistor is operable to selectively ground a receiver end of the second transmission line.
    Type: Grant
    Filed: May 30, 2008
    Date of Patent: January 24, 2012
    Assignee: National ICT Australia Limited
    Inventors: Chien M. Ta, Stan Skafidas, Rob Evans
  • Patent number: 8068791
    Abstract: A Time Division Duplex (TDD) switch of a TDD wireless communication system is provided. By its unique arrangement, the TDD switch protects a receiver of the wireless system.
    Type: Grant
    Filed: April 23, 2007
    Date of Patent: November 29, 2011
    Assignee: Samsung Electronics Co., Ltd
    Inventor: Seong-Hun Kim
  • Patent number: 8055210
    Abstract: A transceiver for radio-frequency communication comprises a waveguide, a transmitting port, a receiving port and a receiver load termination. The waveguide receives and transmits radio-frequency signals. The transmitting port is connected to the waveguide and transmits the radio-frequency signals to the waveguide. The receiving port is connected to the waveguide and receives the radio-frequency signals from the waveguide. The receiver load termination is connected to the waveguide and removes the vertical polarization components of the receiving radio-frequency signals. The receiver load termination includes a filtering unit to reduce the energy of the transmitting radio-frequency signals entering the receiver load termination.
    Type: Grant
    Filed: June 17, 2008
    Date of Patent: November 8, 2011
    Assignee: Microelectronics Technology, Inc.
    Inventors: Hongru Suchen, Ping Chin Tseng
  • Patent number: 8035537
    Abstract: Methods and apparatus are provided for programmable decoding of a plurality of code types. A method is provided for decoding data encoded using one of a plurality of code types, where each of the code types correspond to a communication standard. The code type associated with the data is identified and the data is allocated to a plurality of programmable parallel decoders. The programmable parallel decoders can be reconfigured to decode data encoded using each of the plurality of code types. A method is also provided for interleaving data among M parallel decoders using a communications network. An interleaver table is employed, wherein each entry in the interleaver table identifies one of the M parallel decoders as a target decoder and a target address of a communications network for interleaved data. Data is interleaved by writing the data to the target address of the communications network.
    Type: Grant
    Filed: June 13, 2008
    Date of Patent: October 11, 2011
    Assignee: LSI Corporation
    Inventors: Alexander Andreev, Sergey Gribok, Oleg Izyumin, Ranko Scepanovic, Igor Vikhliantsev, Vojislav Vukovic
  • Patent number: 8014766
    Abstract: A method for providing wavetable information to a wireless device from a content server over a wireless network, the wavetable information including a plurality of samples corresponding to a plurality of notes, comprising: in response to a request from the wireless device, receiving at a proxy server the wavetable information from the content server; filtering the wavetable information in accordance with a selection of samples contained in the request; and, transmitting the filtered wavetable information to the wireless device.
    Type: Grant
    Filed: December 20, 2010
    Date of Patent: September 6, 2011
    Assignee: Research in Motion Limited
    Inventor: Connor O'Rourke
  • Patent number: 8005448
    Abstract: The present invention is an RF duplex filter that is used to remove transmit signals from the receive path of a full duplex transceiver. The RF duplex filter includes a notch filter for blocking signals at a transmit frequency and a bandpass filter for enhancing signals at a receive frequency. The notch filter is formed with series resonant elements and the bandpass filter is formed with parallel resonant elements. One embodiment of the present invention may include tunable resonant elements for tuning the notch filter to a transmit frequency, tuning the bandpass filter to a receive frequency, or both. Calibration circuitry may be included in the full duplex receiver for adjusting the tunable resonant elements. The present invention includes a method for calibrating the tunable resonant elements.
    Type: Grant
    Filed: May 10, 2007
    Date of Patent: August 23, 2011
    Assignee: RF Micro Devices, Inc.
    Inventors: Kelvin Kai Tuan Yan, Dong-Jun Yang
  • Patent number: 8005437
    Abstract: A radio transceiver device includes circuitry for radiating electromagnetic signals at a very high radio frequency both through space, as well as through wave guides that are formed within a substrate material. In one embodiment, the substrate comprises a dielectric substrate formed within a board, for example, a printed circuit board. In another embodiment of the invention, the wave guide is formed within a die of an integrated circuit radio transceiver. A plurality of transceivers with different functionality is defined. Substrate transceivers are operable to transmit through the wave guides, while local transceivers are operable to produce very short range wireless transmissions through space. A third and final transceiver is a typical wireless transceiver for communication with remote (non-local to the device) transceivers. Additionally, a multi-mode transceiver is operable to configure transmit and receive circuitry based upon transmission path.
    Type: Grant
    Filed: June 14, 2007
    Date of Patent: August 23, 2011
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza Rofougaran
  • Patent number: 7949310
    Abstract: A radio transceiver device includes circuitry for radiating electromagnetic signals at a very high radio frequency both through space, as well as through wave guides that are formed within a substrate material. In one embodiment, the substrate comprises a dielectric substrate formed within a board, for example, a printed circuit board. In another embodiment of the invention, the wave guide is formed within a die of an integrated circuit radio transceiver. A plurality of transceivers with different functionality is defined. Substrate transceivers are operable to transmit through the wave guides, while local transceivers are operable to produce very short range wireless transmissions through space. A third and final transceiver is a typical wireless transceiver for communication with remote (non-local to the device) transceivers.
    Type: Grant
    Filed: March 26, 2007
    Date of Patent: May 24, 2011
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza (Reza) Rofougaran
  • Patent number: 7917115
    Abstract: Methods and systems for auto detecting and auto switching antennas in a multi-antenna FM transmit/receive system are disclosed and may include detecting when an external antenna may be coupled to an external port of the wireless device and utilizing the external antenna for transmitting and/or receiving FM signals. The decoupling of an external antenna from an external port may be detected, which may cause the FM radio transmitter/receiver to be configured to transmit and/or receive FM signals utilizing antennas internal to the wireless device. One or more test signals, which may include AC signals, may be generated within the chip for detecting whether an external antenna may be coupled to an external port. A reflected signal from an external port may be measured and compared to a prestored value corresponding to a reflection due to an open circuit at the one or more external ports of the wireless device.
    Type: Grant
    Filed: August 1, 2007
    Date of Patent: March 29, 2011
    Assignee: Broadcom Corporation
    Inventor: Thomas Baker
  • Patent number: 7885174
    Abstract: A method is provided for operating a wireless local device. In this method a local device receives a beacon for a current superframe in a common signal format. The beacon includes time slot assignment information. The local device then determines a device format for the transmission of data to a remote device based on format determination information. The device format can be one of a common signal format, and one or more wireless formats. The local device then determines one or more remote device time slots in the superframe assigned for transmission of the data to the remote device based on the time slot assignment information. Finally, the local device transmits the data in the one or more remote device time slots to the remote device using the device format.
    Type: Grant
    Filed: June 17, 2004
    Date of Patent: February 8, 2011
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Matthew L. Welborn, John W. McCorkle
  • Patent number: 7860455
    Abstract: An electric field generated by another electric field communications apparatus reaches electric field sensor ES. Electric field sensor ES outputs an electric signal in response to the changes in the electric field. The electric field that reaches electric field sensor ES enters a return path of the electric field communications apparatus that is a source of the electric field. By locating electric field sensor ES between receiver main electrode ERB and receiver return electrode ERG, electric field intensity at the location where electric field sensor ES is positioned. Therefore, sensitivity of the changes in electric field for electric field communications apparatus TRX can be improved.
    Type: Grant
    Filed: July 17, 2003
    Date of Patent: December 28, 2010
    Assignee: NTT DoCoMo, Inc.
    Inventors: Masaaki Fukumoto, Toshiaki Sugimura, Hirotaka Nakano
  • Patent number: 7680464
    Abstract: An RF interconnection between RF Printed Wiring Boards (PWBs) includes a waveguide transmission line coupled between the RF PWBs. The waveguide feeds are provided as integral parts of each PWB. In one embodiment, the waveguide interconnecting the PWBs is provided as an integral part of a support structure which supports the PWBs. By providing the interconnecting waveguide and the feeds at each end of the waveguide as integral pieces of other already existing structures, a reliable, low cost RF interconnection between RF PWBs having relatively few separate pieces is provided.
    Type: Grant
    Filed: December 30, 2004
    Date of Patent: March 16, 2010
    Assignee: Valeo Radar Systems, Inc.
    Inventors: Joseph S. Pleva, Richard P. Donovan, Stephen P. Leblanc
  • Patent number: 7680463
    Abstract: A method and an arrangement for testing a radio device without radiation losses are provided. The arrangement comprises a waveguide closed at both its ends and comprising a holder arranged to hold the radio device at least partly inside the waveguide in such a manner that the radiating part of the radio device remaining outside the waveguide is entirely inside the holder. The arrangement also comprises at least one coupling inside the waveguide for transmission and reception of a radio-frequency signal.
    Type: Grant
    Filed: December 19, 2003
    Date of Patent: March 16, 2010
    Assignee: JOT Automation Oy
    Inventors: Taavi Hirvonen, Ari Immonen, Pekka Jakkula
  • Patent number: 7650121
    Abstract: A time division duplexing (TDD) transmission/reception apparatus and method are provided. The TDD transmission/reception apparatus includes: a transmitter which generates a transmitted signal; an antenna which transmits the transmitted signal to an external device and receives a received signal from an external device; a receiver which restores source data by demodulating the received signal; and a polarized duplexer which has a first end connected to the transmitter and the receiver and a second end connected to the antenna and comprises an inclined surface, the inclined surface polarizing the transmitted signal and the received signal such that the directivity of the transmitted signal and the directivity of the received signal are perpendicular to each other.
    Type: Grant
    Filed: February 17, 2006
    Date of Patent: January 19, 2010
    Assignee: Industry - University Cooperation Foundation Sogang University
    Inventors: Kie Jin Lee, Jong Cheol Kim, Doo Hee Song
  • Patent number: 7613429
    Abstract: The invention aims at providing an NRD guide transceiver not requiring a change-over switch for transmission and reception, a download system being of a simple structure and capable of downloading large-capacity data such as video data and the like in a short time using this transceiver and a download memory used in this system, said NRD guide transceiver comprising a pair of dielectric strips (154, 155) disposed between a pair of conductor plates (152, 153) arranged in parallel with each other at a specified interval, wherein Schottky barrier diodes (156, 157) are connected to the respective ends of both of said pair of dielectric strips, a low pass filter (164) is connected to a signal input terminal and a high pass filter (165) is connected to an IF output terminal.
    Type: Grant
    Filed: October 15, 2004
    Date of Patent: November 3, 2009
    Assignee: Intelligent Cosmos Research Institute
    Inventors: Tsukasa Yoneyama, Hirokazu Sawada
  • Patent number: 7565170
    Abstract: A station for processing a first signal which can be generated by a mobile terminal and belongs to a plurality of signals for mobile radio communications networks.
    Type: Grant
    Filed: December 24, 2002
    Date of Patent: July 21, 2009
    Assignee: Telecom Italia S.p.A.
    Inventors: Flavio Buscaglia, Valerio Bernasconi
  • Patent number: 7542730
    Abstract: A method for providing wavetable information to a wireless device from a content server over a wireless network, the wavetable information including a plurality of samples corresponding to a plurality of notes, comprising: in response to a request from the wireless device, receiving at a proxy server the wavetable information from the content server; filtering the wavetable information in accordance with a selection of samples contained in the request; and, transmitting the filtered wavetable information to the wireless device.
    Type: Grant
    Filed: November 24, 2004
    Date of Patent: June 2, 2009
    Assignee: Research in Motion Limited
    Inventor: Connor O'Rourke
  • Patent number: 7522886
    Abstract: A radio frequency transceiver having a printed circuit board (PCB) on which are located a plurality of components, the PCB being sandwiched between a base and a cover. The cover having a plurality of components for accommodating each of the plurality of components to separate the plurality of components into a number of virtual modules. All interconnects between the number of virtual modules are in the PCB. The PCB has a radio frequency (RF) layer, a RF ground layer, a direct current (DC) layer, and a DC ground layer. There is a plurality of via holes from the RF ground layer to the DC ground layer to provide virtual RF ground.
    Type: Grant
    Filed: August 21, 2003
    Date of Patent: April 21, 2009
    Assignee: Amplus Communication Pte. Ltd.
    Inventors: Lean Wui Leon Koh, Eng Poh Pang
  • Patent number: 7460851
    Abstract: A method and an apparatus for integrating a surface acoustic wave (SAW) filter and a transceiver are provided to solve the problem of having a large area of the prior-art integration of a SAW filter and a transceiver; wherein a device for integrating a SAW filter and a transceiver is provided and a component stack method is used to accomplish the integration of the SAW filter and the transceiver, and thus besides featuring a low cost and a small area as well as avoiding a signal loss, the invention can further include a design of encapsulating other components and chips, or even suitable to be used for various integrated circuit packaging technologies (such as QFP and BGA, etc.
    Type: Grant
    Filed: November 9, 2005
    Date of Patent: December 2, 2008
    Assignee: Richwave Technology Corp.
    Inventors: Yu-Ling Chiu, Tsyr-Shyang Liou
  • Patent number: 7457591
    Abstract: A transceiver assembly including an antenna input/output transition, a transmit module, a receive module, and a diplexer. The diplexer has opposing planar surfaces and the transmit module, receive module and antenna input/output transition are placed on the same planar surface of the diplexer.
    Type: Grant
    Filed: October 30, 2006
    Date of Patent: November 25, 2008
    Assignee: REMEC Broadband Wireless LLC
    Inventors: Patric W McDonald, Daniel J. Bryson, Patrick Green
  • Patent number: 7330703
    Abstract: The present invention relates to a transceiver for bidirectional frequency division multiplexed transmission, a communication system including one or more transceivers. Optionally, the communication system is a communication system for a digital subscriber line. The transceiver comprises transmission means with a voltage source output or a current source output for transmitting data in a transmission frequency range, receiving means for receiving data in a receiving frequency range, and a coupling impedance for connecting the transmission means and the receiving means to a transmission medium. The magnitude of the coupling impedance in the transmission frequency range is smaller than the magnitude of the coupling impedance in the receiving frequency range if the transmission means has a voltage source output and is higher than the magnitude of the coupling impedance in the receiving frequency range if the transmission means has a current source output.
    Type: Grant
    Filed: October 29, 2003
    Date of Patent: February 12, 2008
    Assignee: Broadcom Corporation
    Inventor: Rudi Verbist
  • Patent number: 7123883
    Abstract: The present invention relates to systems and methods that employ a novel balanced duplexer that can be utilized to facilitate concurrent signal transmission and reception. The systems and methods can be employed within mobile devices such as cell phones and utilize two-filters (e.g., acoustic) with substantially similar input/output impedances interfaced with two couplers (e.g., 3 dB hybrid), which provide isolation and maintain the duplexer's input/output impedance. The couplers interface the filters to front/back ends such as signal processors, transmitters and receivers. The novel aspects of the present invention mitigate the need to employ external directional couplers between the duplexer and front/back ends. In addition, the two-filter topology enables employment of lower powered rated filters. The systems and methods further provide for separation and isolation of transmitters and receivers, which reduces noise coupling and enables the transmitter and receiver to be placed within close proximity.
    Type: Grant
    Filed: September 26, 2003
    Date of Patent: October 17, 2006
    Assignee: Nokia Corporation
    Inventor: Phil Mages
  • Patent number: 7123884
    Abstract: A radio frequency (RF) switch which is used in an RF unit of a communication apparatus and which has less of an insertion loss during a transmission. A strip line disposed in the RF switch is formed by combining first and second strip lines having different values of characteristic impedance from each other.
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: October 17, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd
    Inventors: Hideaki Nakakubo, Tomoyuki Iwasaki
  • Patent number: 7109922
    Abstract: ABSTRACTA transceiver (20) for a millimeter wave signal, consisting of a PCB (140) having PCB microstrip lines (141) and PCB waveguide apertures (159), and one or more transmitter modules (22) and one or more receiver modules (24, 26, 28) mounted on the PCB. Each module has a single microstrip-waveguide transition (34, 48) and a microstrip-microstrip transition (47, 49). The microstrip-waveguide transition of each module couples to one of the PCB waveguide apertures via a PCB-module waveguide-waveguide transition (167). The microstrip-microstrip transition of each module couples to one of the PCB microstrip lines via a PCB-module microstrip-microstrip transition (165). The PCB-module transitions are low tolerance, facilitating implementation of the transceiver.
    Type: Grant
    Filed: April 15, 2003
    Date of Patent: September 19, 2006
    Assignee: Roadeye Flr General Partnership
    Inventor: Amir Shmuel
  • Patent number: 7107015
    Abstract: A frequency transverter (10) and method for enabling bi-frequency dual-directional transfer of digitally encoded data on an RF carrier by translating between a crowded or otherwise undesirable first frequency band, such as the 2.4 GHz ISM band, and a less-crowded or otherwise desirable second frequency band, such as the 5.0 GHz–6.0 GHz U-NII band. In a preferred embodiment, the transverter (10) connects between an existing data radio (11) and its existing antenna (30), and comprises a bandswitch (12); an input RF isolating device (14); a transmuter (16); a converter (18); a dual output local oscillator (20); an output RF isolating device (22); and an antenna (24) tuned to the second frequency band. The bandswitch (12) allows for bypassing the transverter (10), thereby facilitating its use with legacy systems. The transmuter (14) and converter (16) are adapted to convert to and from, respectively, the second frequency band.
    Type: Grant
    Filed: April 21, 2005
    Date of Patent: September 12, 2006
    Assignee: Honeywell Federal Manufacturing & Technologies, LLC
    Inventors: Jeffrey David Stepp, Dale Hensley
  • Patent number: 7099692
    Abstract: An infrared transceiver module for enabling a multiple direction infrared communication includes a transfer element for enlarging the working angles of infrared emission and reception of a transmitter and receiver portion. The transfer element has a surface area larger than the surface area of the transmitter and receiver portion. Infrared signal beam transmitting from the transmitter and receiver portion is repeatedly refracted by said transfer element and transmitted in multiple directions from the transfer element. Exterior signal beams coming to any portion of the transfer element are also repeatedly refracted by said transfer element and received by said transmitter and receiver portion. Therefore, a multiple direction infrared transmission and reception is obtained.
    Type: Grant
    Filed: May 22, 2003
    Date of Patent: August 29, 2006
    Assignee: Lite-On Technology Corporation
    Inventor: Wen-Kuan Lin
  • Patent number: 7068118
    Abstract: A pulse modulator includes a circulator which comprises: two ferrite plates; a plurality of mode suppressors for transmitting therethrough an LSM mode electromagnetic wave while shutting off an LSE mode electromagnetic wave; and an impedance matching member mounted on one end face of each of the mode suppressors, wherein a pulse modulation switch having a Schottky barrier diode is mounted on the other end face of any one of the mode suppressors in such a manner that the direction of application of a bias voltage to the Schottky barrier diode coincides with the direction of electric field of the LSM mode electromagnetic wave, and wherein the distance from an edge of the ferrite plates to the Schottky barrier diode is set approximately equal to n?/2. Herein, n is an integer not smaller than 1, and ? is the wavelength of the high frequency signal.
    Type: Grant
    Filed: January 30, 2002
    Date of Patent: June 27, 2006
    Assignee: Kyocera Corporation
    Inventors: Hironori Kii, Nobuki Hiramatsu
  • Patent number: 7024165
    Abstract: A frequency transverter (10) and method for enabling bi-frequency dual-directional transfer of digitally encoded data on an RF carrier by translating between a crowded or otherwise undesirable first frequency band, such as the 2.4 GHz ISM band, and a less-crowded or otherwise desirable second frequency band, such as the 5.0 GHz-6.0 GHz U-NII band. In a preferred embodiment, the transverter (10) connects between an existing data radio (11) and its existing antenna (30), and comprises a bandswitch (12); an input RF isolating device (14); a transmuter (16); a converter (18); a dual output local oscillator (20); an output RF isolating device (22); and an antenna (24) tuned to the second frequency band. The bandswitch (12) allows for bypassing the transverter (10), thereby facilitating its use with legacy systems. The transmuter (14) and converter (16) are adapted to convert to and from, respectively, the second frequency band.
    Type: Grant
    Filed: June 14, 2002
    Date of Patent: April 4, 2006
    Assignee: Honeywell Federal Manufacturing & Technologies, LLC
    Inventors: Jeffrey David Stepp, Dale Hensley
  • Patent number: 6985760
    Abstract: A foldable portable radio terminal is disclosed which normally optimizes an antenna characteristic by an antenna matching circuit even if the body length of the foldable portable radio terminal varies. A folded state detection circuit sends a detection signal to a control section depending upon whether or not the foldable portable radio terminal is folded. An antenna matching circuit is determined so that the antenna characteristic of an antenna is optimized when the foldable portable radio terminal is in a folded state. When the foldable portable radio terminal is unfolded, the control section renders a matching characteristic changeover circuit operative to change over the matching characteristic of the antenna matching circuit so that, even when the foldable portable radio terminal is in an unfolded state, the antenna characteristic by the antenna matching circuit may be optimized.
    Type: Grant
    Filed: May 29, 2001
    Date of Patent: January 10, 2006
    Assignee: NEC Corporation
    Inventor: Yoshimasa Hosonuma
  • Patent number: 6980776
    Abstract: The present invention provides a transceiver apparatus that permits miniaturization even when the antenna thereof is an unbalanced circuit and the transmitter circuit section and receiver circuit section thereof are balanced circuits. The transceiver apparatus is constituted comprising: a semiconductor integrated circuit device that mounts on the same semiconductor chip a balanced receiver circuit 41 for receiving a received signal as a differential input and balanced transmitter circuit 52 for outputting a transmitted signal as a differential output, and that has at least two terminals 71,72 connected to connecting nodes that connect the balanced receiver circuit 41 and the balanced transmitter circuit 52; first and second capacitors C2,C3 connected to the terminals 71, 72 respectively; an external inductor L1 connected to the first and second capacitors C2, C3; a band pass filter 2 and an antenna 1 coupled to the first capacitor C2; and a third capacitor C1 connected to the second capacitor C3.
    Type: Grant
    Filed: December 4, 2002
    Date of Patent: December 27, 2005
    Assignees: Rohm Co., Ltd, RF Chips Technology Inc.
    Inventors: Yoshikazu Shimada, Hiroyuki Ashida, Katsuya Ogura, Sadao Igarashi
  • Patent number: 6892056
    Abstract: For the purpose of making the system more economic, given full compensation of transmitter and receiver signal attenuation in the communication cable, the circuit controlling transmitter enable/disable status, including a controllable power source (control command converter) and a low pass filter separating a receive/transmit UHF signal from a lower frequency up to direct voltage) signal, a number of control commands, is introduced into mobile station, mobile station having autonomous power supply. According to the first variant of the device, the control command, having passed the low pass filter (19), enables the power source (21) control from which power is supplied to the power amplifier (11) whose amplification is selected so as to compensate attenuation of the transmitter signal traveling from mobile station (1) to antenna (16).
    Type: Grant
    Filed: June 22, 2000
    Date of Patent: May 10, 2005
    Inventors: Alexandr Vasilievich Garmonov, Sergei Nikolaevich Dodik, Anatoly Maximovich Zherebjatiev, Yaroslav Vladimirovich Grishchuk
  • Patent number: 6868258
    Abstract: It is an object of the invention to provide a connection structure for connecting the dielectric strip of an NRD guide with a metal waveguide, in which the conversion loss (connection loss) for high-frequency signals is reduced, and in which the NRD guide as well as the millimeter wave integrated circuit in which the NRD guide is incorporated can be made smaller. A non-radiative dielectric waveguide is made by arranging a dielectric strip for propagating high-frequency signals between parallel planar conductors arranged at a spacing of not more than half the wavelength of a high-frequency signal, a conductive member being arranged at an end face of a terminal end of the dielectric strip. An aperture is formed in at least one of the parallel planar conductors at a location where the electrical field of an LSM mode stationary wave propagating along the dielectric strip becomes largest. An open terminal end of a metal waveguide is connected to this aperture.
    Type: Grant
    Filed: April 26, 2001
    Date of Patent: March 15, 2005
    Assignee: Kyocera Corporation
    Inventors: Kazuki Hayata, Kazuhiro Matsui, Nobuki Hiramatsu
  • Publication number: 20040266384
    Abstract: Methods and apparatus are provided for an interconnect system for coupling radio frequency signals from one component to another in a RF system. The interconnect system acts as a coaxial connection. The apparatus comprises an interconnect, a dielectric sleeve, and a conductive elastomeric gasket. The interconnect has a first major surface and second major surface for providing an electrical connection. A through hole is formed in a first component. The dielectric sleeve is placed in the through hole. The interconnect is placed in the dielectric sleeve. The conductive elastomeric gasket is placed in proximity to the through hole contacting the first component and a second component. The RF system is assembled compressing the elastomeric gasket to have intimate contact with the first and second component. The intimate contact electrically connects the first and second component and an electric shield is formed around the interconnect thereby suppressing the reception and transmission of RF signals.
    Type: Application
    Filed: June 27, 2003
    Publication date: December 30, 2004
    Inventor: Richard F. Davis
  • Patent number: 6832081
    Abstract: A NRD guide includes a pair of parallel plate conductors opposed to each other at a spacing equal to or shorter than half the wavelength of a high-frequency signal to be transmitted and having opposing inner surfaces whose arithmetic average roughness Ra satisfies 0.1 &mgr;m≦Ra≦50 &mgr;m, and a dielectric strip arranged between the pair of parallel plate conductors and held in contact with the respective inner surfaces of the parallel plate conductors. The dielectric strip is strongly secured to the inner surfaces to exhibit an excellent durability. The transmission loss of the high-frequency signal can be effectively suppressed.
    Type: Grant
    Filed: October 12, 2000
    Date of Patent: December 14, 2004
    Assignee: Kyocera Corporation
    Inventors: Nobuki Hiramatsu, Takeshi Okamura, Kazuki Hayata, Yoshitake Terashi, Hironori Kii, Hiroshi Uchimura, Akinori Sato