Patents by Inventor Robert John Mark Longstone

Robert John Mark Longstone 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).

  • Patent number: 9762325
    Abstract: An optical signal transmission apparatus (1) for a rotating antenna comprising a plurality of optical modulators (6) arranged for receiving a respective plurality of analog RF signals (5) and for modulating a respective plurality of optical signals therewith to produce a plurality of modulated analog optical signals (8). A plurality of opto-electrical converters (14) each converts a respective modulated analog optical signal (13) into an analog electrical signal. The plurality of optical modulators (6) are rotationally coupled in optical communication with the plurality of opto-electrical converters (14) via an optical rotary joint (10) including a reversion prism.
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: September 12, 2017
    Assignee: BAE SYSTEMS plc
    Inventors: David John Aitken, Simon Charles Giles, Robert John Mark Longstone, Mohammed Nawaz, Andrew James Smith, Michael Andrew Scott
  • Publication number: 20150304043
    Abstract: An optical signal transmission apparatus (1) for a rotating antenna comprising a plurality of optical modulators (6) arranged for receiving a respective plurality of analogue RF signals (5) and for modulating a respective plurality of optical signals therewith to produce a plurality of modulated analogue optical signals (8). A plurality of opto-electrical converters (14) each converts a respective modulated analogue optical signal (13) into an analogue electrical signal. The plurality of optical modulators (6) are rotationally coupled in optical communication with the plurality of opto-electrical converters (14) via an optical rotary joint (10) including a reversion prism.
    Type: Application
    Filed: December 13, 2013
    Publication date: October 22, 2015
    Applicant: BAE SYSTEMS plc
    Inventors: DAVID JOHN AITKEN, SIMON CHARLES GILES, ROBERT JOHN MARK LONGSTONE, MOHAMMED NAWAZ, ANDREW JAMES SMITH, MICHAEL ANDREW SCOTT
  • Patent number: 9065458
    Abstract: A frequency synthesizer and oscillator are disclosed for reducing noise in processed signals. The synthesizer and oscillator comprise an array of frequency dividers adapted to receive an input signal, which is derived from a single signal source having a prescribed frequency. The synthesizer and oscillator further comprise at least one frequency multiplier coupled to at least one of the frequency dividers, such that in use, the dividers and the at least one multiplier are operable to generate a plurality of frequencies which are coherent with the prescribed frequency. A regulated power supply is also disclosed comprising a filter and first and second regulators, for reducing noise in the output voltage of the power supply.
    Type: Grant
    Filed: April 11, 2011
    Date of Patent: June 23, 2015
    Assignee: BAE SYSTEMS PLC
    Inventors: Robert John Mark Longstone, Ian Morrison Graham
  • Publication number: 20130033330
    Abstract: A frequency synthesiser and oscillator are disclosed for reducing noise in processed signals. The synthesiser and oscillator comprise an array of frequency dividers adapted to receive an input signal, which is derived from a single signal source having a prescribed frequency. The synthesiser and oscillator further comprise at least one frequency multiplier coupled to at least one of the frequency dividers, such that in use, the dividers and the at least one multiplier are operable to generate a plurality of frequencies which are coherent with the prescribed frequency. A regulated power supply is also disclosed comprising a filter and first and second regulators, for reducing noise in the output voltage of the power supply.
    Type: Application
    Filed: April 11, 2011
    Publication date: February 7, 2013
    Applicant: BAE SYSTEMS PLC
    Inventors: Robert John Mark Longstone, Ian Morrison Graham