Patents by Inventor Bret W. Spars

Bret W. Spars 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 antenna
    Patent number: 8497809
    Abstract: An aperture of an antenna for a radar system comprises a first waveguide comprising a first protrusion and a second protrusion, each protrusion extending longitudinally along one side of the first waveguide. The aperture further comprises a second waveguide comprising a third protrusion and a fourth protrusion, each protrusion extending longitudinally along one side of the second waveguide. The first and third protrusions and second and fourth protrusions adjoin to form a radio frequency choke at least partially suppressing cross polarization of radio frequencies between the first and second waveguides.
    Type: Grant
    Filed: December 19, 2011
    Date of Patent: July 30, 2013
    Assignee: Rockwell Collins, Inc.
    Inventors: Brian J. Herting, James B. West, Wajih A. ElSallal, John C. Mather, Bret W. Spars, Daniel L. Woodell
  • Electronically scanned antenna
    Patent number: 8098207
    Abstract: An aperture of an antenna for a radar system comprises a first waveguide comprising a first protrusion and a second protrusion, each protrusion extending longitudinally along one side of the first waveguide. The aperture further comprises a second waveguide comprising a third protrusion and a fourth protrusion, each protrusion extending longitudinally along one side of the second waveguide. The first and third protrusions and second and fourth protrusions adjoin to form a radio frequency choke at least partially suppressing cross polarization of radio frequencies between the first and second waveguides.
    Type: Grant
    Filed: September 16, 2008
    Date of Patent: January 17, 2012
    Assignee: Rockwell Collins, Inc.
    Inventors: Brian J. Herting, James B. West, Wajih A. ElSallal, John C. Mather, Bret W. Spars, Daniel L. Woodell