Patents by Inventor Brian J. Wilkes

Brian J. Wilkes 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).

  • Dual band feed system
    Patent number: 4821046
    Abstract: A dual frequency band microwave antenna feed for a parabolic reflector has a circular waveguide for a low frequency band and a smaller circular waveguide for a higher frequency band disposed in and concentric with the low band guide. A twisted conductive baffle is disposed in each guide to permit 90.degree. rotation of linearly cross-polarization signals and a pair of in-line ports is attached to each guide for output of such pairs of cross-polarization signals.
    Type: Grant
    Filed: April 6, 1987
    Date of Patent: April 11, 1989
    Inventor: Brian J. Wilkes
  • Concentric waveguides for a dual-band feed system
    Patent number: 4819005
    Abstract: A dual-band linear cross-polarized antenna waveguide comprising a coaxial pair of waveguides, with the higher frequency band waveguide contained completely within the TE.sub.01 mode null of the lower frequency band. The lower frequency waveguide completely surrounds and is concentric to the higher frequency waveguide.
    Type: Grant
    Filed: August 21, 1986
    Date of Patent: April 4, 1989
    Inventor: Brian J. Wilkes