By Shielding Patents (Class 455/300)
  • Patent number: 9692367
    Abstract: Cooled electronic circuitry may include multiple and substantially parallel circuitry surfaces, each containing power amplifier circuitry, having a side edge, and includes material between at least a portion of the base plate and the side edge that provides a level of thermal conductivity of at least 167 W/m-k; and a cooling plate having a flat surface attached to each of the side edges of the circuitry surfaces in a thermally-conductive manner.
    Type: Grant
    Filed: April 20, 2015
    Date of Patent: June 27, 2017
    Assignee: DAICO INDUSTRIES, INC.
    Inventors: Ruben X. Mao, Mark White
  • Patent number: 9627130
    Abstract: A first and second electronic device each including a connection surface and a magnetic element. The first and second devices may be in contact along the respective connection surfaces. The magnetic elements may be configured to align the first and second devices by moving either or both of the first and second devices relative to each other to achieve an aligned position. The magnetic element may also be operative to resist disconnection of first and second electronic devices when in the aligned position.
    Type: Grant
    Filed: March 24, 2015
    Date of Patent: April 18, 2017
    Assignee: APPLE INC.
    Inventors: Albert J. Golko, Eric S. Jol, Christopher S. Graham, Paul J. Thompson, Jeffrey M. Alves, Daniel Wagman, Stephen E. Yao, Makiko K. Brzezinski
  • Patent number: 9336477
    Abstract: The RFID wrist band includes an elastic block section including an airtight storage part, an elastic band section connected to the elastic block section to form an annular shape, and an inlay stored in the storage part and including a base substrate, an antenna on the base substrate, and an IC chip connected electrically with the antenna. The inlay is not fixed to an inner wall of the storage part, and the storage part is larger than a volume occupied by the inlay.
    Type: Grant
    Filed: June 12, 2013
    Date of Patent: May 10, 2016
    Assignee: SATO HOLDINGS KABUSHIKI KAISHA
    Inventor: Haruhiko Nitta
  • Patent number: 8993899
    Abstract: Various systems of an electronic deice and methods for manufacturing the same are provided. In some embodiments, a routing assembly is provided that may not only route a cable along a circuit board, but that may also shield and electronic component or secure an electronic component to the circuit board. In some other embodiments, there is provided a mechanism for electrically coupling two components of an electronic device that may also be visually appealing in the context of other portions of the electronic device.
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: March 31, 2015
    Assignee: Apple Inc.
    Inventors: Shayan Malek, Benjamin J. Pope, Daniel W. Jarvis, Tang Yew Tan, Richard H. Dinh, Robert J. Steinfeld, Ramachandran Chundru
  • Patent number: 8948712
    Abstract: Aspects of the present disclosure relate to determining the location and/or density of vias that form part of an RF isolation structure of a packaged module and the resulting RF isolation structures. From electromagnetic interference (EMI) data, locations of where via density can be increased and/or decreased without significantly degrading the EMI performance of the RF isolation structure can be identified. In certain embodiments, one or more vias can be added and/or removed from a selected area of the packaged module based on the EMI data.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: February 3, 2015
    Assignee: Skyworks Solutions, Inc.
    Inventors: Howard E. Chen, Matthew Sean Read, Hoang Mong Nguyen, Anthony James LoBianco, Guohao Zhang, Dinhphuoc Vu Hoang
  • Patent number: 8923748
    Abstract: There are provided a high frequency module and a receiver capable of exhausting an electric field and a magnetic field to the outside of a shield, more closely arranging electronic components inside the shield, and being downsized. The high frequency module has integrated circuits (IC) 112, 113 each incorporating an oscillator including an inductor, and a shield case 114 as a shield for covering the ICs 112, 113, and the shield case 114 as a shield is formed with openings 116A, 116B having a size equal to or more than half the shape size of the ICs 112, 113 in areas opposed to the arrangement positions of the ICs 112, 113.
    Type: Grant
    Filed: October 4, 2010
    Date of Patent: December 30, 2014
    Assignee: Sony Corporation
    Inventors: Tadashi Imai, Takayuki Kaida, Hitoshi Masumura
  • Patent number: 8682275
    Abstract: A converter in a radio-frequency (RF) apparatus includes a feedback circuitry. The feedback circuitry has a shielded input and a shielded output. The shielded input and the shielded output of the feedback circuitry tend to reduce interference in the converter.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: March 25, 2014
    Assignee: Silicon Laboratories Inc.
    Inventors: Donald A. Kerth, G. Diwakar Vishakhadatta
  • Patent number: 8594751
    Abstract: A portable audio device having reduced sensitivity to RF interference over a predetermined frequency range from an adjacent mobile wireless communications device may include a portable housing, a battery carried thereby, a recharging power input connected to the battery, a digital signal input, and an audio analog signal output. A digital-to-analog converter (DAC) may be carried by the portable housing and powered by the battery for converting a selected digital audio file from a memory into an analog audio signal. An audio analog amplifier may be connected between the DAC and the audio analog signal output. A first RF filter(s) may be connected to the recharging power input, and a second RF filter(s) may be connected to the audio analog signal output, both for reducing RF interference over the predetermined frequency range from the adjacent mobile wireless communications device.
    Type: Grant
    Filed: February 6, 2013
    Date of Patent: November 26, 2013
    Assignee: Blackberry Limited
    Inventors: Lizhong Zhu, Michael Stephen Corrigan, George Soliman Mankaruse
  • Patent number: 8548533
    Abstract: A wireless headset has improved immunity to RF electromagnetic interference produced from wireless communications devices. A headset body is adapted to be worn by a user and includes a microphone and earpiece. An antenna receives wireless communication signals and passes them to RF and audio circuitry mounted within the headset body. The RF and audio circuitry include a Bluetooth module operatively connected to the antenna for transmitting and receiving wireless communication signals, an audio CODEC connected to the Bluetooth module, and audio connection lines connected between the CODEC and the earpiece and between the CODEC and the microphone. A filter is connected into each of the audio connection lines at the earpiece and microphone and operative for reducing the RF coupling from a mobile wireless communications device.
    Type: Grant
    Filed: September 5, 2012
    Date of Patent: October 1, 2013
    Assignee: Blackberry Limited
    Inventors: Lizhong Zhu, George Soliman Mankaruse, Michael Stephen Corrigan
  • Patent number: 8543103
    Abstract: Embodiments relate to a system for conducting hearing aid compatibility testing of a mobile communication device. The system comprises: a simulated hand for supporting the mobile communication device during the testing; a probe; and a processor. The processor is configured to cause the probe to be positioned in a sequence of positions in proximity to the mobile communication device relative to an audio output component of the mobile communication device during the testing and to determine a field strength of a field radiated by the mobile communication device at the sequence of positions based on an output of the probe at each position.
    Type: Grant
    Filed: September 12, 2012
    Date of Patent: September 24, 2013
    Assignee: BlackBerry Limited
    Inventors: Yihong Qi, Ying Tong Man, Perry Jarmuszewski, Daoud S. Attayi, Paul Gerard Giles Cardinal
  • Patent number: 8423803
    Abstract: A management controller, method and program product for forcing one or more power states on a display, the management controller comprising: a computer (110) configured to receive a power management electronic signal; the computer (110) comprising control logic that operates without use of an operating system to determine a desired level of the power management electronic signal and to set the power management electronic signal to the desired level; and the computer (110) configured to send the power management electronic signal at the desired level to a monitor (120).
    Type: Grant
    Filed: April 23, 2008
    Date of Patent: April 16, 2013
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Andrew Brown, Alan M. Green
  • Patent number: 8401469
    Abstract: Embodiments described herein include a computing device that is capable of inductive signal transfer with other computing devices. Such computing devices are provided a shield that protects the device and other components from electromagnetic interference and unwanted electrical affects resulting from the inductive signal transfer.
    Type: Grant
    Filed: June 4, 2009
    Date of Patent: March 19, 2013
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Manjirnath Chatterjee, Mark Corbridge, Michael Lehr, Wim Crooijmans
  • Patent number: 8391933
    Abstract: A portable audio device having reduced sensitivity to RF interference over a predetermined frequency range from an adjacent mobile wireless communications device may include a portable housing, a battery carried thereby, a recharging power input connected to the battery, a digital signal input, and an audio analog signal output. A digital-to-analog converter (DAC) may be carried by the portable housing and powered by the battery for converting a selected digital audio file from a memory into an analog audio signal. An audio analog amplifier may be connected between the DAC and the audio analog signal output. A first RF filter(s) may be connected to the recharging power input, and a second RF filter(s) may be connected to the audio analog signal output, both for reducing RF interference over the predetermined frequency range from the adjacent mobile wireless communications device.
    Type: Grant
    Filed: March 28, 2011
    Date of Patent: March 5, 2013
    Assignee: Research In Motion Limited
    Inventors: Lizhong Zhu, Michael Corrigan, George Mankaruse
  • Patent number: 8346199
    Abstract: A mobile wireless communications device includes a housing and circuit board in the housing and having radio frequency (RF) circuitry and a power amplifier and microphone mounted thereon. An antenna is carried within the housing and operative with the RF circuitry. An RF shield surrounds and isolates the microphone from the RF circuitry, power amplifier and antenna and shields the microphone from radiated energy generated from the RF circuitry, antenna or power amplifier.
    Type: Grant
    Filed: April 30, 2012
    Date of Patent: January 1, 2013
    Assignee: Research In Motion Limited
    Inventors: Michael Stephen Corrigan, George Soliman Mankaruse, Lizhong Zhu
  • Patent number: 8301133
    Abstract: Embodiments relate to a system for conducting hearing aid compatibility testing of a mobile communication device. The system comprises: a simulated hand for supporting the mobile communication device during the testing; a probe; and a processor. The processor is configured to cause the probe to be positioned in a sequence of positions in proximity to the mobile communication device relative to an audio output component of the mobile communication device during the testing and to determine a field strength of a field radiated by the mobile communication device at the sequence of positions based on an output of the probe at each position.
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: October 30, 2012
    Assignee: Research In Motion Limited
    Inventors: Yihong Qi, Ying Tong Man, Perry Jarmuszewski, Daoud S. Attayi, Paul Gerard Giles Cardinal
  • Patent number: 8285343
    Abstract: A wireless headset has improved immunity to RF electromagnetic interference produced from wireless communications devices. A headset body is adapted to be worn by a user and includes a microphone and earpiece. An antenna receives wireless communication signals and passes them to RF and audio circuitry mounted within the headset body. The RF and audio circuitry include a Bluetooth module operatively connected to the antenna for transmitting and receiving wireless communication signals, an audio CODEC connected to the Bluetooth module, and audio connection lines connected between the CODEC and the earpiece and between the CODEC and the microphone. A filter is connected into each of the audio connection lines at the earpiece and microphone and operative for reducing the RF coupling from a mobile wireless communications device.
    Type: Grant
    Filed: July 20, 2011
    Date of Patent: October 9, 2012
    Assignee: Research In Motion Limited
    Inventors: Lizhong Zhu, George Mankaruse, Michael Corrigan
  • Patent number: 8270929
    Abstract: An RF shielding device for application to mobile devices includes an RF blocking screen material configured to cover a front face of the mobile device. The screen material includes a grounding material that contacts a body portion of the mobile device for grounding the screen material to the mobile device. The RF shielding device allows proper operation of a touchscreen interface. The RF shielding device may be configured as a self-adhesive material dimensioned to cover a substantial portion of the front face of the mobile device. Alternatively, the RF shielding device may be constructed as a case or protective shell.
    Type: Grant
    Filed: September 9, 2011
    Date of Patent: September 18, 2012
    Assignee: Contech RF Devices, LLC
    Inventors: Richard P. Koeppel, Jessica Lynn Button, Ronald H. Koeppel
  • Patent number: 8259452
    Abstract: An electronic device according to the present invention comprises a pair of housings coupled to each other openably and closably by a hinge mechanism, and each of the housings comprises a front cabinet and a back cabinet joined to each other. The back cabinet of at least one of the housings is formed from a material having a greater expansion coefficient than that of a material forming the front cabinet, and the back cabinet of at least one of the housings has a cutting part extending in the width direction perpendicular to the longitudinal direction thereof and longitudinally cutting at least a part of the back cabinet.
    Type: Grant
    Filed: February 24, 2009
    Date of Patent: September 4, 2012
    Assignee: KYOCERA Corporation
    Inventors: Katsushige Kori, Masaki Ikari
  • Patent number: 8190112
    Abstract: A mobile wireless communications device includes a housing and circuit board in the housing and having radio frequency (RF) circuitry and a power amplifier and microphone mounted thereon. An antenna is carried within the housing and operative with the RF circuitry. An RF shield surrounds and isolates the microphone from the RF circuitry, power amplifier and antenna and shields the microphone from radiated energy generated from the RF circuitry, antenna or power amplifier.
    Type: Grant
    Filed: January 19, 2011
    Date of Patent: May 29, 2012
    Assignee: Research In Motion Limited
    Inventors: Michael Corrigan, George Mankaruse, Lizhong Zhu
  • Patent number: 8155616
    Abstract: The present invention uses metallization termination techniques to reduce the electro-magnetic field scattering at the edges of metallized areas. The metallization termination techniques provide a gradual transition from high conductivity areas to high impedance areas. The mobile phone antenna illuminates the PCB allowing currents to flow on the PCB. When the currents reach edges of the PCB they flow through a region of increasingly high impedance without reflecting back or scattering.
    Type: Grant
    Filed: May 16, 2008
    Date of Patent: April 10, 2012
    Assignee: Sony Mobile Communications AB
    Inventors: James Gerard Hayes, Scott Ladell Vance
  • Patent number: 8064838
    Abstract: An information handling system includes a digital circuit having a first terminal connected to a first voltage reference, and a second terminal connected to a second voltage reference. The digital circuit is configured to be coupled to a radio device. The system also includes a band pass filter having a first terminal connected to the first voltage reference, and a second terminal connected to the second voltage reference. The bandpass filter is configured to produce a low impedance response, to reduce a radio frequency noise generated at a specific frequency band of the band pass filter, and to reduce a radio frequency interference produced by the digital circuit and received at the radio device.
    Type: Grant
    Filed: June 18, 2008
    Date of Patent: November 22, 2011
    Assignee: Dell Products, LP
    Inventors: Jeffrey C. Hailey, Ernest W. Lentschke, III
  • Patent number: 7986979
    Abstract: A wireless headset has improved immunity to RF electromagnetic interference produced from wireless communications devices. A headset body is adapted to be worn by a user and includes a microphone and earpiece. An antenna receives wireless communication signals and passes them to RF and audio circuitry mounted within the headset body. The RF and audio circuitry include a Bluetooth module operatively connected to the antenna for transmitting and receiving wireless communication signals, an audio CODEC connected to the Bluetooth module, and audio connection lines connected between the CODEC and the earpiece and between the CODEC and the microphone. A filter is connected into each of the audio connection lines at the earpiece and microphone and operative for reducing the RF coupling from a mobile wireless communications device.
    Type: Grant
    Filed: February 18, 2009
    Date of Patent: July 26, 2011
    Assignee: Research in Motion Limited
    Inventors: Lizhong Zhu, George Mankaruse, Michael Corrigan
  • Patent number: 7945231
    Abstract: A semiconductor device for an ultra-wideband standard for ultra-high-frequency communication includes an ultra-wideband semiconductor chip and a multilayer circuit substrate with at least one lower metal layer and one upper metal layer, in which an ultra-wideband circuit with passive devices is arranged. The lower metal layer has external contact pads on which external contacts are arranged, via which the semiconductor device can be surface-mounted on a circuit board. In addition, the semiconductor device has an antenna which is operatively coupled to the ultra-wideband semiconductor chip via the circuit on the circuit substrate and is arranged above the semiconductor chip and the circuit substrate.
    Type: Grant
    Filed: February 15, 2007
    Date of Patent: May 17, 2011
    Assignee: Infineon Technologies AG
    Inventors: Juergen Hoegerl, Thomas Killer
  • Patent number: 7881689
    Abstract: A radar electronics module includes a support structure having a first surface having a plurality of recesses with a transmitter circuit board and a receiver circuit board disposed thereon. The transmitter and receiver circuit boards are disposed over the first surface of the supports structure such that transmitter and receive circuits are disposed in cavities on the support structure. The radar electronics module further includes a digital/power supply circuit printed wiring board (PWB) disposed on a second surface of the support structure and a connector disposed on the support structure. The connector is disposed in such a way that it provides electrical connections for at least one of power signals, analog signals or digital signals between at least two of the digital/power supply PWB, the transmitter circuit board and the receiver circuit board.
    Type: Grant
    Filed: February 2, 2009
    Date of Patent: February 1, 2011
    Assignee: Valeo Radar Systems, Inc.
    Inventors: Stephen P. Leblanc, Richard Paul Donovan, Joseph S. Pleva
  • Patent number: 7856259
    Abstract: A portable communication device including a casing having a front section and a back section is provided. The back section may at least partly made of an electrically conducting material. The casing also may enclose a ground plane and a radio circuit that is connected to a radiation receiving antenna element and the ground plane. The radiation receiving antenna element is provided in an area of electrically conducting material of the back section of the casing.
    Type: Grant
    Filed: August 29, 2007
    Date of Patent: December 21, 2010
    Assignee: Sony Ericsson Mobile Communications AB
    Inventor: Jonas Bergh
  • Patent number: 7787921
    Abstract: A field device in an industrial process control system having an electrically grounded housing with an electrical circuit located within the housing is described. The electrical circuit includes wireless communication circuitry and is electrically isolated from the housing. The field device also includes an antenna that is attached to the housing and a cable having a shield positioned between the wireless communication circuitry and the antenna. The cable provides electrical communication between the electrical circuit and the antenna. The electrical circuit is electrically isolated from the housing, and the shield of the cable is electrically grounded to the housing.
    Type: Grant
    Filed: June 12, 2007
    Date of Patent: August 31, 2010
    Assignee: Rosemount Inc.
    Inventor: Carl R. Gansen
  • Patent number: 7725095
    Abstract: An RF unit comprises a tuner, a demodulator and a mixer. At least the tuner and the mixer are disposed on separate first and second substrates. The RF unit further comprises a housing accommodating the first and second substrates. The first substrate and the second substrate are arranged on different levels inside the housing and maintain a predetermined distance between each other.
    Type: Grant
    Filed: November 4, 2004
    Date of Patent: May 25, 2010
    Assignee: Thomson Licensing
    Inventors: Tiam Fatt Tey, Lye Yoong Lum, Feng Lin
  • Patent number: 7720447
    Abstract: The disclosure relates to a radio frequency (RF) and/or microwave power amplification device which is intended, for example, for a radio communication terminal, comprising means for shielding the device and means for controlling the power delivered as output from said device, said power-control means comprising a power servo loop having power-amplification means, reference means, detection means and comparison means. The aforementioned control means also comprise at least one sensor to detect the energy radiated inside the device.
    Type: Grant
    Filed: November 19, 2004
    Date of Patent: May 18, 2010
    Assignee: Wavecom
    Inventor: Gregory Fron
  • Patent number: 7718905
    Abstract: An electronic device has housing having plural inner surfaces, plural modules in the housing, and a communication section provided on each of the plural modules. The communication sections perform wireless communication to each other. One inner surface having the largest area among the plural inner surfaces of the housing has an electric wave absorber that absorbs an electric wave for use of the wireless communication.
    Type: Grant
    Filed: October 19, 2006
    Date of Patent: May 18, 2010
    Assignee: Sony Corporation
    Inventors: Masahiro Yoshioka, Takashi Nakanishi, Seiji Wada, Tetsujiro Kondo
  • Patent number: 7711343
    Abstract: The present invention relates an RF tuner module that comprises one or more standard RF connectors. As, relative big, standard RF connectors are widely in use but at the same time there is a pressure to make products smaller an RF tuner module design is size constrained. The invention describes a measure to make an RF tuner module, with a standard RF-connector, smaller by extending one of the shielding sides of the RF tuner in order to facilitate a proper mounting of the RF connector to the RF tuner module.
    Type: Grant
    Filed: April 26, 2005
    Date of Patent: May 4, 2010
    Assignee: NXP B.V.
    Inventors: Kim Leng Soh, Ernst Bressau
  • Patent number: 7680509
    Abstract: There is provided a highly reliable transmission/reception integrated radio-frequency apparatus which can achieve a high communication quality in a cable modem. A reception RF signal is input to a reception system block via an input/output terminal, converted to an intermediate-frequency signal, and output from a terminal. An output terminal of a transmission processing section of a transmission system block is connected to the input/output terminal via an overvoltage protection circuit, a high-pass filter functioning as a countermeasure to overvoltage, and a low-pass filter for suppressing harmonics produced from the high-pass filter.
    Type: Grant
    Filed: April 17, 2006
    Date of Patent: March 16, 2010
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shuji Abe, Katsuya Kudo, Masami Oosawa
  • Patent number: 7627297
    Abstract: A multi-tuner system includes a first conversion tuner that converts a first RF signal among a plurality of RF signals received from an antenna into a first IF signal using a first conversion mode, the first RF signal corresponding to a first selected channel; and a second conversion tuner that converts a second RF signal among the RF signals into a second IF signal using a second conversion mode, the second RF signal corresponding to a second selected channel. Any IF interference between the tuners is eliminated, and the tuners can be fabricated into a single module.
    Type: Grant
    Filed: September 29, 2006
    Date of Patent: December 1, 2009
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventor: Chang Kap Nam
  • Patent number: 7616973
    Abstract: A portable audio device having reduced sensitivity to RF interference over a predetermined frequency range from an adjacent mobile wireless communications device may include a portable housing, a battery carried thereby, a recharging power input connected to the battery, a digital signal input, and an audio analog signal output. A digital-to-analog converter (DAC) may be carried by the portable housing and powered by the battery for converting a selected digital audio file from a memory into an analog audio signal. An audio analog amplifier may be connected between the DAC and the audio analog signal output. A first RF filter(s) may be connected to the recharging power input, and a second RF filter(s) may be connected to the audio analog signal output, both for reducing RF interference over the predetermined frequency range from the adjacent mobile wireless communications device.
    Type: Grant
    Filed: January 30, 2006
    Date of Patent: November 10, 2009
    Assignee: Research In Motion Limited
    Inventors: Lizhong Zhu, Michael Corrigan, George Mankaruse
  • Patent number: 7603097
    Abstract: A radar electronics module includes a support structure having a first surface having a plurality of recesses with a transmitter circuit board and a receiver circuit board disposed thereon. The transmitter and receiver circuit boards are disposed over the first surface of the supports structure such that transmitter and receive circuits are disposed in cavities on the support structure. The radar electronics module further includes a digital/power supply circuit printed wiring board (PWB) disposed on a second surface of the support structure and a connector disposed on the support structure. The connector is disposed in such a way that it provides electrical connections for at least one of power signals, analog signals or digital signals between at least two of the digital/power supply PWB, the transmitter circuit board and the receiver circuit board.
    Type: Grant
    Filed: December 30, 2005
    Date of Patent: October 13, 2009
    Assignee: Valeo Radar Systems, Inc.
    Inventors: Stephen P. Leblanc, Richard Paul Donovan, Joseph S. Pleva
  • Publication number: 20090156118
    Abstract: A rebroadcasting apparatus for mobile media includes a receiving antenna and a transmitting antenna. The signal to be rebroadcast is received with a circularly polarized directional antenna. The transmitting antenna has circular polarization opposite to the polarization of the receiving antenna. Amplifiers and filters may be included between receiving and transmitting antennas to regulate retransmitted signal quality. The transmitting antenna uses one or more bays of quasi-helical dipole radiators excited using manifold feed equipped with tuning paddles. The transmitting antenna may be formed from light-weight sheet metal or other readily mass-produced materials. The transmitting antenna may be housed within an ordinary security camera enclosure or similar radio-transparent housing.
    Type: Application
    Filed: December 12, 2007
    Publication date: June 18, 2009
    Inventor: John L. Schadler
  • Patent number: 7542742
    Abstract: A down converter includes a housing, a down conversion circuit, and a shielding structure. The down conversion circuit is disposed in the housing. The shielding structure is disposed above the down conversion circuit. The shielding structure comprises a cavity and a fine-tunable mechanism. A size of the cavity is adjusted by the fine-tunable mechanism.
    Type: Grant
    Filed: June 16, 2005
    Date of Patent: June 2, 2009
    Assignee: Wistron NeWeb Corporation
    Inventors: Huang-Chen Shih, Cheng-Nan Lee, Tsung-Ying Chung, Yung-Chin Chen, Hung-Yuan Lin
  • Patent number: 7515944
    Abstract: A wireless headset has improved immunity to RF electromagnetic interference produced from wireless communications devices. A headset body is adapted to be worn by a user and includes a microphone and earpiece. An antenna receives wireless communication signals and passes them to RF and audio circuitry mounted within the headset body. The RF and audio circuitry include a Bluetooth module operatively connected to the antenna for transmitting and receiving wireless communication signals, an audio CODEC connected to the Bluetooth module, and audio connection lines connected between the CODEC and the earpiece and between the CODEC and the microphone. A filter is connected into each of the audio connection lines at the earpiece and microphone and operative for reducing the RF coupling from a mobile wireless communications device.
    Type: Grant
    Filed: November 30, 2005
    Date of Patent: April 7, 2009
    Assignee: Research In Motion Limited
    Inventors: Lizhong Zhu, George Mankaruse, Michael Corrigan
  • Patent number: 7444174
    Abstract: A mobile wireless communications device includes a housing and circuit board carried by the housing. RF circuitry and a processor are operative with each other and carried by the circuit board. A receiver speaker and microphone are carried by the housing. Audio circuitry is carried by the circuit board and operative with the RF circuitry and processor. A microphone audio switch and receiver speaker audio switch are carried by the circuit board and are connected with audio connection lines that interconnect the processor. A filter is operative with the audio connection lines and operatively connected to at least one of the microphone audio switch or receiver speaker audio switch to reduce conducted and radiated interfering RF energy from coupling into the audio circuitry.
    Type: Grant
    Filed: February 24, 2005
    Date of Patent: October 28, 2008
    Assignee: Research in Motion Limited
    Inventors: Lizhong Zhu, Michael Corrigan, George Mankaruse, Perry Jarmuszewski
  • Patent number: 7440741
    Abstract: A method and system for over-the-air testing of a radio transreceiver is described. The radio transreceiver is placed in an enclosure box that is shielded to prevent leakage of RF energy. A nest assembly holds in place the radio transreceiver during testing to provide repeatable results with different radios. The testing assembly allows high volume characterization of the radio transreceiver performance in an environment rich with interfering RF signals.
    Type: Grant
    Filed: September 19, 2002
    Date of Patent: October 21, 2008
    Assignee: Symbol Technologies, Inc.
    Inventors: James Comerford, Francisco Naranjo
  • Publication number: 20080214136
    Abstract: The present invention uses metallization termination techniques to reduce the electro-magnetic field scattering at the edges of metallized areas. The metallization termination techniques provide a gradual transition from high conductivity areas to high impedance areas. The mobile phone antenna illuminates the PCB allowing currents to flow on the PCB. When the currents reach edges of the PCB they flow through a region of increasingly high impedance without reflecting back or scattering.
    Type: Application
    Filed: May 16, 2008
    Publication date: September 4, 2008
    Inventors: Gerard James Hayes, Scott Ladell Vance
  • Patent number: 7421245
    Abstract: A radio frequency identification (RFID) system is described that utilizes a substantially-contiguous conductive shield to shape an electromagnetic field formed by an antenna for communication with RFID tags. The antenna and the conductive shield have substantially planar forms, and may be mounted to a surface of a check-in/check-out area. The conductive shield is positioned around the antenna and within a plane parallel to the antenna, e.g., within the same plane. The conductive shield shapes the electromagnetic field to extend substantially in a direction perpendicular to the antenna, and prevents the electromagnetic field from forming substantially over the conductive shield.
    Type: Grant
    Filed: February 20, 2004
    Date of Patent: September 2, 2008
    Assignee: 3M Innovative Properties Company
    Inventors: Seth A. Lieffort, Edward D. Goff
  • Patent number: 7376408
    Abstract: The present invention uses metallization termination techniques to reduce the electro-magnetic field scattering at the edges of metallized areas. The metallization termination techniques provide a gradual transition from high conductivity areas to high impedance areas. The mobile phone antenna illuminates the PCB allowing currents to flow on the PCB. When the currents reach edges of the PCB they flow through a region of increasingly high impedance without reflecting back or scattering.
    Type: Grant
    Filed: August 10, 2004
    Date of Patent: May 20, 2008
    Assignee: Sony Ericsson Mobile Communications AB
    Inventors: Gerard James Hayes, Scott Ladell Vance
  • Patent number: 7366472
    Abstract: The invention relates to a method of rendering telecommunication devices ineffective, by creating a substantially radio frequency radiation-free environment by providing an interference generating pattern (IGP) adjacent to the environment in a position between the environment and a source of radio frequency radiation signals so as to substantially reduce, or interfere with such signals thus preventing typical operation of the wireless telecommunications devices. The IGP is generally one that is non-conductive and is or includes a diffraction grating. The IGP is positioned adjacent the environment between the environment and a source of radio frequency radiation signals. Preferably, the IGP is provided as a support member configured in the shape of a diffraction grating, and includes a paint or coating of a non-conductive material having a high dielectric constant thereon.
    Type: Grant
    Filed: May 14, 2004
    Date of Patent: April 29, 2008
    Inventors: Al Messano, Alan Ross
  • Patent number: 7363017
    Abstract: A high frequency module used as a unit circuit making up a phased array antenna, in which the module may be reduced in size with reduction in cost. A high frequency module 10 includes a dielectric substrate 1 having both surfaces metallized. The dielectric substrate has a first metallized layer 2 and a second metallized layer 3 formed on both surfaces and has a low noise amplifier and the phase shifter IC 9 mounted on the metallized layer 2 on one surface. The high frequency module 10 also includes a low noise transistor 7 and a distributed constant circuit 12, formed on the one surface of the dielectric substrate 1 to form the low noise amplifier together, and an input terminal 5, an output terminal 6 and power supply terminals 15A to 15D formed by leading out the metallized layer 2 on the one surface to the opposite side surface of the dielectric substrate 1 in such a manner as to maintain insulation from the metallized layer 3 on the opposite side surface.
    Type: Grant
    Filed: December 21, 2004
    Date of Patent: April 22, 2008
    Assignee: NEC Electronics Corporation
    Inventors: Tatsuya Miya, Kazuharu Kimura
  • Patent number: 7327996
    Abstract: The invention relates to a high sensitivity receiver installed outdoors which may be used in a base station of a mobile communication system, for example. A received radio frequency signal is converted into a signal in a desired frequency band by a reception bandpass filter RXF3, is subject to a low noise amplification to a desired level by a low noise reception amplifier LNA4, and the amplified signal is converted into an optical signal by a laser diode LD5. RXF3, LNA4 and LD5 are confined in a heat shielding box. LD5 is cooled by cooling means to the order of critical temperature where RXF3, for example, assumes a superconducting state, whereby the dynamic range is increased and stabilized.
    Type: Grant
    Filed: December 2, 2003
    Date of Patent: February 5, 2008
    Assignee: NTT DoCoMo, Inc.
    Inventors: Ning Chen, Yoshiaki Tarusawa, Kei Satoh, Shoichi Narahashi, Noriyoshi Terada, Toshio Nojima
  • Patent number: 7313358
    Abstract: A communication system that intercepts incoming radio signals and transmits a second signal notifying the user that a radio signal has been intercepted. The communication does so by using an interference generator that is passive, such as a shield, or active, such as destructive interference generators to create a zone in which the radio device does not receive the original incoming radio signal. Using an antenna located outside that zone, a registrar then intercepts incoming signals and notifies the user of the communication using a user-defined method. For example, the incoming signal can be rerouted to a landline or a paper message can be generated and delivered to the user.
    Type: Grant
    Filed: June 8, 2002
    Date of Patent: December 25, 2007
    Inventor: Christopher P Ricci
  • Patent number: 7289167
    Abstract: A metal frame body has first to fourth side plates and is divided, by a shield plate provided in the metal frame body, into a first compartment area near the first side plate and a second compartment area near the second side plate. A distributor is arranged in the first compartment area and a tuner unit is arranged in the second compartment area. A first connector is arranged in a position on the third side plate adjacent to the first compartment area and a second connector, which is connected to the distributor, is arranged in a position on the fourth side plate adjacent to the first compartment area. The distance from the second side plate to the central axis of the first connector is equal to the distance from the second side plate to the central axis of the second connector.
    Type: Grant
    Filed: September 2, 2004
    Date of Patent: October 30, 2007
    Assignee: Alps Electric Co., Ltd.
    Inventor: Masaki Yamamoto
  • Patent number: 7268836
    Abstract: A television tuner device includes a metal frame, including a shielding plate which separates the space defined by the metal frame into a first chamber at a first side plate and a second chamber at a second side plate opposite to the first side plate; a distribution unit may be disposed in the first chamber; a tuning unit disposed in the second chamber includes a mixer circuit converting a television signal into an intermediate-frequency signal, an oscillator provides the mixer circuit with an oscillated signal, and a phase-locked-loop (PLL) circuit controls the oscillation frequency of the oscillator; and a crystal oscillator disposed in the first chamber provides the PLL circuit with a reference signal.
    Type: Grant
    Filed: September 2, 2004
    Date of Patent: September 11, 2007
    Assignee: Alps Electric Co., Ltd.
    Inventor: Masaki Yamamoto
  • Patent number: 7245896
    Abstract: An apparatus for improving reception sensitivity of a public wave receiver includes power devices formed in a power supply of the public wave receiver, and a shielding plate for shielding noise generated by the power devices. A signal line for connecting an antenna used for the public wave receiver to a public wave receiver main body and a ground line are formed coaxially to each other by a shield layer.
    Type: Grant
    Filed: June 23, 2003
    Date of Patent: July 17, 2007
    Assignee: LG Electronics Inc.
    Inventors: Dong Han Seo, Jong Woo Kim, Chan Tae Kim, Oh Suk Kwon, Jae Geun Lee
  • Patent number: 7224953
    Abstract: A receiving device in which the shielding performance is improved to solve a pulling problem in a receiving device of a direct conversion system is provided.
    Type: Grant
    Filed: July 25, 2003
    Date of Patent: May 29, 2007
    Assignee: Sony Corporation
    Inventor: Masayuki Hosoi