Patents by Inventor Hideki Hatakeyama

Hideki Hatakeyama 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).

  • Phase shift circuit, high frequency switch, and phase shifter
    Patent number: 7495529
    Abstract: Provided is a small-size phase shift circuit having a broad band characteristic. The phase shift circuit includes: a first switching element for switching between a through path and a capacitance capacity; a second switching element for switching the capacitance capacity for the through path and the ground; and a first and a second inductor having inductance. One end of the first switching element is connected to one end of the second switching element by the first inductor while the other ends of the first and the second switching element are connected to each other by the second inductor. One end of the first switching element is connected to a high-frequency signal input terminal while the other end of the first switching element is connected to a high-frequency signal output terminal. Thus, it is possible to constitute a phase device satisfying a predetermined condition.
    Type: Grant
    Filed: March 26, 2004
    Date of Patent: February 24, 2009
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kenichi Miyaguchi, Morishige Hieda, Tamotsu Nishino, Masatake Hangai, Moriyasu Miyazaki, Norihiro Yunoue, Hideki Hatakeyama, Yukihisa Yoshida, Tadashi Takagi
  • Phase shift circuit, high frequency switch, and phase shifter
    Publication number: 20070188264
    Abstract: Provided is a small-size phase shift circuit having a broad band characteristic. The phase shift circuit includes: a first switching element for switching between a through path and a capacitance capacity; a second switching element for switching the capacitance capacity for the through path and the ground; and a first and a second inductor having inductance. One end of the first switching element is connected to one end of the second switching element by the first inductor while the other ends of the first and the second switching element are connected to each other by the second inductor. One end of the first switching element is connected to a high-frequency signal input terminal while the other end of the first switching element is connected to a high-frequency signal output terminal. Thus, it is possible to constitute a phase device satisfying a predetermined condition.
    Type: Application
    Filed: March 26, 2004
    Publication date: August 16, 2007
    Inventors: Kenichi Miyaguchi, Morishige Hieda, Tamotsu Nishino, Masatake Hangai, Moriyasu Miyazaki, Norihiro Yunoue, Hideki Hatakeyama, Yukihisa Yoshida, Tadashi Takagi