Patents by Inventor David R. Ulmer

David R. Ulmer 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).

  • Transverse device array phase shifter circuit techniques and antennas
    Patent number: 6999040
    Abstract: A transverse device array phase shifter includes an overmoded waveguide structure having a top conductive broad wall surface, a bottom conductive broad wall surface and opposed first and second conductive side wall surfaces. At least one transverse device array circuit is positioned in the waveguide circuit. Each circuit comprises a generally planar dielectric substrate having a microwave circuit defined thereon, and a plurality of spaced discrete phase shifter elements. The substrate is disposed within the waveguide structure generally transverse to the side wall surfaces. A bias circuit applies a voltage to reverse bias the phase shifter elements. The transverse device array phase shifter circuit causes a change in phase of microwave or millimeter-wave energy propagating through the waveguide structure.
    Type: Grant
    Filed: June 18, 2003
    Date of Patent: February 14, 2006
    Assignee: Raytheon Company
    Inventors: Ralston S. Robertson, Jr., William H. Henderson, Robert T. Lewis, Ruey-Shi Chu, David W. Baker, Brian M. Pierce, David R. Ulmer, Romulo J. Broas
  • Transverse device array phase shifter circuit techniques and antennas
    Publication number: 20040257288
    Abstract: A transverse device array phase shifter includes an overmoded waveguide structure having a top conductive broad wall surface, a bottom conductive broad wall surface and opposed first and second conductive side wall surfaces. At least one transverse device array circuit is positioned in the waveguide circuit. Each circuit comprises a generally planar dielectric substrate having a microwave circuit defined thereon, and a plurality of spaced discrete phase shifter elements. The substrate is disposed within the waveguide structure generally transverse to the side wall surfaces. A bias circuit applies a voltage to reverse bias the phase shifter elements. The transverse device array phase shifter circuit causes a change in phase of microwave or millimeter-wave energy propagating through the waveguide structure.
    Type: Application
    Filed: June 18, 2003
    Publication date: December 23, 2004
    Inventors: Ralston S. Robertson, William H. Henderson, Robert T. Lewis, Ruey-Shi Chu, David W. Baker, Brian M. Pierce, David R. Ulmer, Romulo J. Broas