Patents by Inventor Akira Tumura

Akira Tumura 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).

  • Waveguide type ortho mode transducer
    Patent number: 7019603
    Abstract: An object of the present invention is to obtain a waveguide type polarizer, which enables miniaturization thereof, shortening of an axis, and broad band promotion, and which has high performance. In order to attain the object, the waveguide type polarizer includes: a first rectangular main waveguide 1; first to fourth rectangular branching waveguides 2a to 2d branching perpendicularly to the first rectangular main waveguide 1; a short-circuit plate 3 connected to one terminal of the first rectangular main waveguide 1; a metallic block 4 provided on the short-circuit plate 3; a rectangular waveguide step 5 connected to the other terminal of the first rectangular main waveguide 1; and a second rectangular main waveguide 6 connected to the rectangular waveguide step 5.
    Type: Grant
    Filed: March 14, 2003
    Date of Patent: March 28, 2006
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Naofumi Yoneda, Moriyasu Miyazaki, Yoji Aramaki, Akira Tumura, Toshiyuki Horie
  • Waveguide type ortho mode transducer
    Publication number: 20040246069
    Abstract: An object of the present invention is to obtain a waveguide type polarizer, which enables miniaturization thereof, shortening of an axis, and broad band promotion, and which has high performance. In order to attain the object, the waveguide type polarizer includes: a first rectangular main waveguide 1; first to fourth rectangular branching waveguides 2a to 2d branching perpendicularly to the first rectangular main waveguide 1; a short-circuit plate 3 connected to one terminal of the first rectangular main waveguide 1; a metallic block 4 provided on the short-circuit plate 3; a rectangular waveguide step 5 connected to the other terminal of the first rectangular main waveguide 1; and a second rectangular main waveguide 6 connected to the rectangular waveguide step 5.
    Type: Application
    Filed: October 21, 2003
    Publication date: December 9, 2004
    Inventors: Naofumi Yoneda, Moriyasu Miyazaki, Yoji Aramaki, Akira Tumura, Toshiyuki Horie