Patents by Inventor Ian J. White

Ian J. White 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).

  • Radar system employing injection locked transmitter stage
    Patent number: 5107272
    Abstract: A radar transmitter chain employing injection locked oscillator, e.g., a magnetron, as an output stage. Problems arise with maintaining the injection locking bandwidth centered on the radar source transmit frequency. This alignment is maintained by allowing the magnetron (38) free running frequency to drift, along with its injection locking bandwidth and then to force the radar source frequency (30) to follow the magnetron frequency. A phase difference measurement (44) between the injection signal (35) and the magnetron output signal (37) provides the control for a feedback loop (60) which may control a tunable VCO (48) or selection from a bank of fixed frequency oscillators (78).
    Type: Grant
    Filed: November 27, 1989
    Date of Patent: April 21, 1992
    Assignee: The Marconi Company Limited
    Inventors: David W. Joynson, Ian J. White