Patents by Inventor Philip D. Kaplan

Philip D. Kaplan 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: 4564935
    Abstract: A tropospheric scatter communication system provides diverse angle transmission paths which may be utilized alone or in conjunction with frequency and/or other known diversity system arrangements for improved performance. The diverse angle transmission paths are routed through sum and difference "monopulse" beams displaced in azimuth.
    Type: Grant
    Filed: January 10, 1984
    Date of Patent: January 14, 1986
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Philip D. Kaplan
  • Patent number: 4217583
    Abstract: Method and apparatus for the detection of a ground moving target using a moving platform MTI radar system are disclosed. Such a moving target is detected by comparing the power level of radar return signals passing in a difference channel of a monopulse receiver with a predetermined power level. In one embodiment, a monopulse antenna of such receiver scans a swath of ground and the power level of radar returns passing in the difference channel having a Doppler frequency equal to the Doppler frequency associated with clutter disposed along the boresight axis of such antenna is compared with a predetermined power level. When the power level of returns in such difference channel at such Doppler frequency is greater than the power level of returns from clutter disposed along the boresight axis (i.e., the predetermined power level), a moving target is indicated.
    Type: Grant
    Filed: May 30, 1975
    Date of Patent: August 12, 1980
    Assignee: Raytheon Company
    Inventors: Edwin R. Hiller, Philip D. Kaplan, Joseph M. Nicosia, Jr., Henry D. Zuerndorfer