Patents by Inventor Robert A. Samsel

Robert A. Samsel 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).

  • GPS navigation and differential-correction beacon antenna combination
    Patent number: 5568162
    Abstract: An antenna system comprises a stack of elements that include a GPS patch antenna on a groundplane with an associated low-noise amplifier (LNA), a first Faraday shield of flat ribbon cable covering a first ferrite rod magnetic field antenna, a second ferrite rod magnetic field antenna separated from and orthogonal to the first ferrite rod magnetic field antenna, a second Faraday shield of flat ribbon cable covering the second ferrite rod magnetic field antenna and having a LNA for each of the ferrite rod magnetic field antennas. A third Faraday shield is positioned between the first and second ferrite rod magnetic field antennas. All the Faraday shields are connected to ground such that there are no loops that may act as shorted turns to avoid desensitizing the ferrite rod magnetic field antennas.
    Type: Grant
    Filed: August 8, 1994
    Date of Patent: October 22, 1996
    Assignee: Trimble Navigation Limited
    Inventors: Robert A. Samsel, Brian G. Westfall, Stephen K. Will