Patents by Inventor Andrew Keir

Andrew Keir has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • System and method for zero intermediate frequency filtering of information communicated in wireless networks
    Patent number: 8280337
    Abstract: A circuit for communicating information in a wireless network includes a filtering circuit in communication with a zero intermediate frequency (ZIF) transceiver circuit. The filtering circuit includes a first mixer in communication with an output of the ZIF transceiver circuit. The filtering circuit includes a first Surface Acoustic Wave (SAW) filter circuit in communication with an output of the first mixer. The filtering circuit includes a second mixer in communication with an output of the first SAW filter circuit. The filtering circuit includes a third mixer, and a second SAW filter circuit in communication with an output of the third mixer. The filtering circuit includes a fourth mixer in communication with an output of the second SAW filter circuit and an input of the ZIF transceiver circuit. The filtering circuit also includes a local oscillator circuit in communication with the first, second, third and fourth mixers.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: October 2, 2012
    Assignee: BelAir Networks Inc.
    Inventors: Marc Dubois, Stephen Rayment, Andrew Keir, Kieran Parsons
  • SYSTEM AND METHOD FOR ZERO INTERMEDIATE FREQUENCY FILTERING OF INFORMATION COMMUNICATED IN WIRELESS NETWORKS
    Publication number: 20110124308
    Abstract: A circuit for communicating information in a wireless network includes a filtering circuit in communication with a zero intermediate frequency (ZIF) transceiver circuit. The filtering circuit includes a first mixer in communication with an output of the ZIF transceiver circuit. The filtering circuit includes a first Surface Acoustic Wave (SAW) filter circuit in communication with an output of the first mixer. The filtering circuit includes a second mixer in communication with an output of the first SAW filter circuit. The filtering circuit includes a third mixer, and a second SAW filter circuit in communication with an output of the third mixer. The filtering circuit includes a fourth mixer in communication with an output of the second SAW filter circuit and an input of the ZIF transceiver circuit. The filtering circuit also includes a local oscillator circuit in communication with the first, second, third and fourth mixers.
    Type: Application
    Filed: January 31, 2011
    Publication date: May 26, 2011
    Applicant: BELAIR NETWORKS INC.
    Inventors: MARC DUBOIS, STEPHEN RAYMENT, ANDREW KEIR, KIERAN PARSONS
  • System and method for zero intermediate frequency filtering of information communicated in wireless networks
    Patent number: 7881690
    Abstract: A circuit for communicating information in a wireless network includes a filtering circuit in communication with a zero intermediate frequency (ZIF) transceiver circuit. The filtering circuit includes a first mixer in communication with an output of the ZIF transceiver circuit. The filtering circuit includes a first Surface Acoustic Wave (SAW) filter circuit in communication with an output of the first mixer. The filtering circuit includes a second mixer in communication with an output of the first SAW filter circuit. The filtering circuit includes a third mixer, and a second SAW filter circuit in communication with an output of the third mixer. The filtering circuit includes a fourth mixer in communication with an output of the second SAW filter circuit and an input of the ZIF transceiver circuit. The filtering circuit also includes a local oscillator circuit in communication with the first, second, third and fourth mixers.
    Type: Grant
    Filed: April 7, 2006
    Date of Patent: February 1, 2011
    Assignee: Belair Networks Inc.
    Inventors: Marc Dubois, Stephen Rayment, Andrew Keir, Kieran Parsons
  • SYSTEM AND METHOD FOR FREQUENCY OFFSETTING OF INFORMATION COMMUNICATED IN MIMO BASED WIRELESS NETWORKS
    Publication number: 20090117859
    Abstract: A communications system includes a multiple-input/multiple-output architecture, which has a plurality of radio frequency chains. One of the plurality of radio frequency chains is configured to apply a first frequency offset to a base frequency of an output signal to generate a first transmitting frequency; and another of the plurality of radio frequency chains being configured to apply a second frequency offset to the base frequency to generate a second transmitting frequency.
    Type: Application
    Filed: November 20, 2008
    Publication date: May 7, 2009
    Applicant: BelAir Networks Inc.
    Inventors: Roland A. Smith, Chris Williams, Stephen Rayment, Andrew Keir
  • System and method for zero intermediate frequency filtering of information communicated in wireless networks
    Publication number: 20070238419
    Abstract: A circuit for communicating information in a wireless network includes a filtering circuit in communication with a zero intermediate frequency (ZIF) transceiver circuit. The filtering circuit includes a first mixer in communication with an output of the ZIF transceiver circuit. The filtering circuit includes a first Surface Acoustic Wave (SAW) filter circuit in communication with an output of the first mixer. The filtering circuit includes a second mixer in communication with an output of the first SAW filter circuit. The filtering circuit includes a third mixer, and a second SAW filter circuit in communication with an output of the third mixer. The filtering circuit includes a fourth mixer in communication with an output of the second SAW filter circuit and an input of the ZIF transceiver circuit. The filtering circuit also includes a local oscillator circuit in communication with the first, second, third and fourth mixers.
    Type: Application
    Filed: April 7, 2006
    Publication date: October 11, 2007
    Applicant: BELAIR NETWORKS INC.
    Inventors: Marc Dubois, Stephen Rayment, Andrew Keir, Kieran Parsons