Patents by Inventor Kiyoshi Momota

Kiyoshi Momota 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 amplifier having collector potential lower than body potential
    Patent number: 5568014
    Abstract: According to this invention, a traveling-wave tube amplifier includes a traveling-wave tube having a multistage depressed collector and a power supply for applying operation voltages to the traveling-wave tube. A body voltage (Vb) for a cathode of the traveling-wave tube is set to be lower than a small-signal synchronous voltage (Vbs) at which a small-signal gain of the traveling-wave tube is maximized. As a result, a tube efficiency (.eta.t) of the traveling-wave tube can be increased and an efficiency of the traveling-wave tube amplifier can be increased as compared with a conventional device.
    Type: Grant
    Filed: December 8, 1993
    Date of Patent: October 22, 1996
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yasuhiro Aoki, Kiyoshi Momota, Tetsuo Yamamoto, Hideki Ide, Hiroshi Onihashi