Patents by Inventor Mike D. Thomas

Mike D. Thomas 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).

  • Patent number: 5459471
    Abstract: A double ridge flared trough radiating element, including a double ridge trough waveguide fed by an embedded coaxial or stripline feed network. Energy couples smoothly to and from the feed network and trough waveguide because the equivalent characteristic impedance at the feed point of the shunt connected waveguide is the same as the feed network characteristic impedance. The radiator can be configured to produce linear, dual-linear or circular polarization.
    Type: Grant
    Filed: December 28, 1993
    Date of Patent: October 17, 1995
    Assignee: Hughes Aircraft Company
    Inventor: Mike D. Thomas
  • Patent number: 5278575
    Abstract: A broadband transition between microstrip transmission line and slotline transmission line. The geometry of integrating the two transmission lines results in a broadband microstrip shunt circuit across the slotline, and a broadband slotline open circuit in the direction opposite of propagation on the slotline. This produces direct coupling between the two transmission lines. The transition does not require any intermediate transmission line types between the microstrip and slotline, and no frequency dependent tuning stubs are used to produce the shunt circuits and open circuits required for coupling. The result is a broadband transition which can be fabricated using standard etching techniques and requiring no plated through holes.
    Type: Grant
    Filed: September 26, 1991
    Date of Patent: January 11, 1994
    Assignee: Hughes Aircraft Company
    Inventor: Mike D. Thomas