Patents by Inventor Hugh Milligan

Hugh Milligan 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).

  • Integrated dual taper waveguide expansion joint
    Patent number: 4369413
    Abstract: A TE.sub.01 circular mode waveguide expansion joint, tapered transition dce in which the expansion joint includes a linear tapered section, the greatest diameter of which does not exceed the cutoff diameter for the TE.sub.02 spurious mode. A second taper of the cosine or other suitable type minimizes TE.sub.02 mode generation as the guide diameter increases past the TE.sub.02 cutoff value. The expansion, transition device simultaneously performs the functions of expansion section and waveguide diameter transition for the TE.sub.01 circular mode while minimizing spurious mode generation.
    Type: Grant
    Filed: February 3, 1981
    Date of Patent: January 18, 1983
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Joseph M. Devan, Hugh Milligan