Patents by Inventor Henry D. Arnett

Henry D. Arnett 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).

  • Frequency-selective loss technique for oscillation prevention in traveling-wave tubes
    Patent number: 4107575
    Abstract: Backward-wave oscillations in a helix or helix-derived traveling-wave tube re prevented by dimensioning the conductive shell surrounding the helix so that the backward-wave space harmonic of the slow-wave interaction circuit has a cutoff frequency in the vicinity of the frequency of the potential backward-wave oscillations. Lossy material is disposed between the shell and helix so that there is strong coupling between the electromagnetic field and the lossy material near the cutoff frequency of the backward-wave space harmonic.
    Type: Grant
    Filed: October 4, 1976
    Date of Patent: August 15, 1978
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Norman R. Vanderplaats, Henry D. Arnett