Patents by Inventor Kazuhito Soga

Kazuhito Soga 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).

  • Traveling wave tube
    Patent number: 7898181
    Abstract: A bottom portion of a metal tape is attached to an end portion of a helix. A coaxial inner conductor for input or output of a high frequency signal is fixed by its end portion being interposed between upright surfaces of the metal tape. The metal tape is joined to the coaxial inner conductor by being laser-welded to opposite side surfaces of the coaxial inner conductor.
    Type: Grant
    Filed: July 3, 2008
    Date of Patent: March 1, 2011
    Assignee: Netcomsec Co., Ltd.
    Inventors: Kazuhito Soga, Akira Chiba
  • Coaxial waveguide converter circuit for traveling-wave tube, method of manufacturing same, and waveguide matching part for use in coaxial waveguide converter circuit
    Patent number: 7589469
    Abstract: A coaxial waveguide converter circuit is provided for converting an input/output coaxial section of a traveling-wave tube to a waveguide. The circuit comprises a waveguide matching part for connecting an inner conductor of the coaxial section extending into the waveguide to a wall of the waveguide. The waveguide matching part includes a fitting hole for fitting the inner conductor thereinto, and a plurality of cantilever supports which define the fitting hole at leading end portions thereof. The leading end portions of the plurality of cantilever supports defining the fitting hole are uniformly kept in close contact with a peripheral surface of the inner conductor.
    Type: Grant
    Filed: July 18, 2007
    Date of Patent: September 15, 2009
    Assignee: NEC Microwave Tube, Ltd.
    Inventors: Kazuhito Soga, Akihiko Nemoto
  • TRAVELING WAVE TUBE
    Publication number: 20090009086
    Abstract: A bottom portion of a metal tape is attached to an end portion of a helix. A coaxial inner conductor for input or output of a high frequency signal is fixed by its end portion being interposed between upright surfaces of the metal tape. The metal tape is joined to the coaxial inner conductor by being laser-welded to opposite side surfaces of the coaxial inner conductor.
    Type: Application
    Filed: July 3, 2008
    Publication date: January 8, 2009
    Applicant: NEC MICROWAVE TUBE, LTD
    Inventors: Kazuhito SOGA, Akira CHIBA
  • COAXIAL WAVEGUIDE CONVERTER CIRCUIT FOR TRAVELING-WAVE TUBE, METHOD OF MANUFACTURING SAME, AND WAVEGUIDE MATCHING PART FOR USE IN COAXIAL WAVEGUIDE CONVERTER CIRCUIT
    Publication number: 20080024251
    Abstract: A coaxial waveguide converter circuit is provided for converting an input/output coaxial section of a traveling-wave tube to a waveguide. The circuit comprises a waveguide matching part for connecting an inner conductor of the coaxial section extending into the waveguide to a wall of the waveguide. The waveguide matching part includes a fitting hole for fitting the inner conductor thereinto, and a plurality of cantilever supports which define the fitting hole at leading end portions thereof. The leading end portions of the plurality of cantilever supports defining the fitting hole are uniformly kept in close contact with a peripheral surface of the inner conductor.
    Type: Application
    Filed: July 18, 2007
    Publication date: January 31, 2008
    Applicant: NEC MICROWAVE TUBE, LTD.
    Inventors: Kazuhito SOGA, Akihiko Nemoto