Patents by Inventor Robert L. Ives

Robert L. Ives 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).

  • Couplers for extracting RF power from a gyrotron cavity directly into fundamental mode waveguide
    Patent number: 5015914
    Abstract: In a gyrotron cavity resonator, generated energy is extracted into a symmetric set of fundamental-mode waveguides by ports disposed to couple energy in phase from the operating electromagnetic mode but in anti-phase with respect to an unwanted mode of lower cutoff frequency than the operating mode, thereby neutralizing coupling to the unwanted mode. A second set of interspersed ports may be disposed to load degenerate, orthogonal modes.
    Type: Grant
    Filed: December 9, 1988
    Date of Patent: May 14, 1991
    Assignee: Varian Associates, Inc.
    Inventors: Robert L. Ives, Howard R. Jory, Albert D. LaRue
  • Mode suppressors for whispering gallery gyrotron
    Patent number: 4851788
    Abstract: A gyrotron interaction resonator 29 operating in a TE.sub.n1 cavity mode has an array of longitudinal slots 32 in the conductive wall 30. The slots 32 are spaced to couple to the unwanted TE.sub.n1 modes and to other modes of differing n and not to the desired mode. Wave-absorptive material 34 spaced from the inner cavity wall 28 and coupled to slots 32 absorbs the unwanted modes.
    Type: Grant
    Filed: June 1, 1988
    Date of Patent: July 25, 1989
    Assignee: Varian Associates, Inc.
    Inventors: Robert L. Ives, Howard R. Jory, Joseph Feinstein