Patents by Inventor James N. Devlin

James N. Devlin 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).

  • Process for evaluating phased array antennas
    Patent number: 6507312
    Abstract: A process for evaluating the radar pattern of a phased array antenna subsystem by utilizing transmissions from a global positioning satellite. This process utilizes a delayed radar target on a moving platform, a remote differential global positioning receiver on the moving platform, a fixed global positioning receiver on the phased array antenna, and a communication data link between the remote global positioning receiver and the fixed global positioning receiver.
    Type: Grant
    Filed: January 15, 2002
    Date of Patent: January 14, 2003
    Assignee: Fredwal, Inc.
    Inventors: Duane G. Fredericks, Herbert W. Rosebrock, James N. Devlin
  • Phase coherent optically delayed radar target
    Patent number: 6492939
    Abstract: A radar target with delayed reply means. The radar target contains devices for: (a) receiving a radar signal which has a frequency of from about 0.5 to about 94 gigahertz, (b) phase coherently amplitude modulating a continuous wave light emission with the radar signal with the frequency of from about 1 to about 94 gigahertz, (c) delaying an amplitude modulated light pulse for at least about one radar pulse width, (d) detecting the delayed modulated amplitude modulated light pulse, (e) converting a detected amplitude modulated light pulse into a converted radio frequency pulse, (f) modulating the converted radio frequency pulse, thereby producing a delayed modulated radio frequency pulse, and (g) transmitting the delayed modulated radio frequency pulse.
    Type: Grant
    Filed: October 18, 2001
    Date of Patent: December 10, 2002
    Inventors: Duane G. Fredericks, James N. Devlin