Patents by Inventor James M. Freebourn

James M. Freebourn 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).

  • Sample-and-hold phase shifter control voltage distribution in a phased array utilizing voltage-controlled phase shift devices
    Patent number: 6856216
    Abstract: A phase shift control voltage distribution scheme for a phased array utilizing voltage-proportional phase shift devices employs a digital-to-analog converter that supplies respectively different analog voltages to a sample-and-hold switch network coupled to analog voltage control inputs of the plurality of voltage-proportional phase shift devices. In order to impart a phase shift control voltage to one or more phase shift elements of the array, a control unit supplies a prescribed combination of a digital control code to the digital-to-analog converter and a switch control code to sample-and-hold switches of the switch network.
    Type: Grant
    Filed: October 6, 2003
    Date of Patent: February 15, 2005
    Assignee: Harris Corporation
    Inventors: Ralph Trosa, Robert W. Perry, Neville Glyn Maycock, Jr., Joseph A. Elam, James M. Freebourn