Patents by Inventor David P. Halley

David P. Halley 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).

  • RF filters and multiplexers with resonator decouplers
    Patent number: 5428325
    Abstract: An RF filter having a housing defining a cavity with plural elongated resonators and plural resonator decouplers adjacent each of plural pairs of the resonators in the housing. The decouplers are grounded adjacent each of their ends only to the housing to provide an enhanced resonator decoupling effect. The filter may instead comprise a dielectric block with resonator holes and resonator decoupler holes each appropriately metalized with the decoupler holes being grounded at each end at external metalized block surfaces.
    Type: Grant
    Filed: December 10, 1993
    Date of Patent: June 27, 1995
    Assignee: Allen Telecom Group, Inc.
    Inventors: Douglas R. Jachowski, David P. Halley, Chia-Sam Wey