Patents by Inventor Daniel G. Swanson, Jr.

Daniel G. Swanson, Jr. 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).

  • Wide percentage bandwidth microwave filter network and method of manufacturing same
    Patent number: 5175518
    Abstract: A high percentage bandwith microwave filter network, according to an embodiment of the present invention, comprises a T-network of capacitors implemented with thin-film techniques by applying a groundplane to one side of an alumina substrate and a first plate to the other side. A silicon nitride dielectric layer having a high density of capacitance is deposited over the first plate, and then a second and third capacitor plate are deposited on the dielectric over the first plate.
    Type: Grant
    Filed: October 15, 1991
    Date of Patent: December 29, 1992
    Assignee: Watkins-Johnson Company
    Inventor: Daniel G. Swanson, Jr.
  • Thin-film microwave filter
    Patent number: 4881050
    Abstract: A thin-film, lumped element filter utilizing spiral inductors and capacitive pi networks is disclosed. The filter is fabricated from a planar dielectric substrate having a ground plane on one side thereof and two thin-film metal layers and an insulation layer disposed therebetween on the opposite side of the dielectric substrate. The metal and insulation layers are configured to form one or more capacitive pi networks and spiral inductors, which are electrically interconnected to form the filter.
    Type: Grant
    Filed: August 4, 1988
    Date of Patent: November 14, 1989
    Assignee: Avantek, Inc.
    Inventor: Daniel G. Swanson, Jr.