Patents by Inventor Richard H. Imgram

Richard H. Imgram 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).

  • Electronically scanned aircraft antenna system having a linear array of yagi elements
    Patent number: 4336543
    Abstract: An electronically scanned antenna system having a linear array of endfire elements. The endfire elements are laterally spaced between about 0.3 .lambda. to 0.9 .lambda. apart, preferably about 0.55 .lambda. apart, to enhance the effects of mutual coupling therebetween for broadening the radiation signal pattern of the elements in the plane of the array. Advantageously, the endfire elements may be of the Yagi type with each endfire element including a common reflector, a driver, and a plurality of directors.
    Type: Grant
    Filed: April 22, 1980
    Date of Patent: June 22, 1982
    Assignee: Grumman Corporation
    Inventors: Frederick M. Ganz, Justine D. Cermignani, Richard H. Imgram