Patents by Inventor Yoshio Yuasa

Yoshio Yuasa 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 having phase velocity tapering means in a slow-wave circuit
    Patent number: 4107572
    Abstract: A traveling-wave tube has a slow wave circuit consisting of a constant phase velocity section extending from the electron gun side of the tube, and a phase velocity tapering section extending from the collector side of the tube in which the phase velocity of the electromagnetic wave is lower than in the constant phase velocity section. An attenuator is located at about the center of the constant phase velocity section. The ratio of the length of the phase velocity tapering section to the distance between the end of the attenuator which faces the collector side of the tube and the electron gun side end of the phase velocity tapering section is equal to, or less than 0.4.
    Type: Grant
    Filed: April 14, 1977
    Date of Patent: August 15, 1978
    Assignee: Nippon Electric Co., Ltd.
    Inventors: Yoshio Yuasa, Yosihiro Morizumi, Ryuzo Orui