Patents by Inventor Yukitsugu Yoshino

Yukitsugu Yoshino 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).

  • Nonreflective waveguide terminator and waveguide circuit
    Patent number: 7002429
    Abstract: A nonreflective waveguide terminator includes a waveguide portion and an electromagnetic wave absorber. The portion has a rectangular opening in a plane perpendicular to a radio-wave propagation direction. The portion has one open end in the direction and the other end closed by a terminating metal internal wall. The portion has a radio-wave propagation space surrounded by first and second metal internal walls parallel to a radio-wave electric field, and third and fourth metal internal walls perpendicular to the field. The exterior shape of the absorber is a parallelepiped. The absorber has a rear-end surface positioned at a predetermined distance from the terminating wall and parallel to the terminating wall or is provided against the terminating wall. The surface of the absorber having the largest rectangular area is on the third or the fourth metal internal wall.
    Type: Grant
    Filed: October 16, 2003
    Date of Patent: February 21, 2006
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hideki Asao, Yukitsugu Yoshino, Kazuhisa Henmi, Hideyuki Oohashi, Yukihiro Tahara, Hideo Ogawa, Naofumi Yoneda, Muneaki Mukuda
  • Nonreflective waveguide terminator and waveguide circuit
    Publication number: 20050017815
    Abstract: A nonreflective waveguide terminator includes a waveguide portion and an electromagnetic wave absorber. The portion has a rectangular opening in a plane perpendicular to a radio-wave propagation direction. The portion has one open end in the direction and the other end closed by a terminating metal internal wall. The portion has a radio-wave propagation space surrounded by first and second metal internal walls parallel to a radio-wave electric field, and third and fourth metal internal walls perpendicular to the field. The exterior shape of the absorber is a parallelepiped. The absorber has a rear-end surface positioned at a predetermined distance from the terminating wall and parallel to the terminating wall or is provided against the terminating wall. The surface of the absorber having the largest rectangular area is on the third or the fourth metal internal wall.
    Type: Application
    Filed: October 16, 2003
    Publication date: January 27, 2005
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Hideki Asao, Yukitsugu Yoshino, Kazuhisa Henmi, Hideyuki Oohashi, Yukihiro Tahara, Hideo Ogawa, Naofumi Yoneda, Muneaki Mukuda