Patents by Inventor Makoto Koukuwano

Makoto Koukuwano 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 power divider having coupling slots between stacked waveguide portions and method of manufacture
    Patent number: 8482361
    Abstract: A coupling slot 10 provided in a wide wall shared by a first rectangular waveguide 8 and a second rectangular waveguide 9 arranged by stacking is formed by directing a longitudinal direction of the coupling slot 10 to a tube axial direction, and a matching conductor 11 projecting to a waveguide near the coupling slot 10 is provided on one sidewall of the second rectangular waveguide 9. A process of providing the matching conductor 11 is easy, a structure that can be manufactured at low cost is obtained, and a power distribution ratio can be set at an arbitrary ratio.
    Type: Grant
    Filed: March 9, 2009
    Date of Patent: July 9, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shigeo Udagawa, Mitsuru Kirita, Makoto Koukuwano
  • WAVEGUIDE POWER DIVIDER AND METHOD OF MANUFACTURING THE SAME
    Publication number: 20100315178
    Abstract: A coupling slot 10 provided in a wide wall shared by a first rectangular waveguide 8 and a second rectangular waveguide 9 arranged by stacking is formed by directing a longitudinal direction of the coupling slot 10 to a tube axial direction, and a matching conductor 11 projecting to a waveguide near the coupling slot 10 is provided on one sidewall of the second rectangular waveguide 9. A process of providing the matching conductor 11 is easy, a structure that can be manufactured at low cost is obtained, and a power distribution ratio can be set at an arbitrary ratio.
    Type: Application
    Filed: March 9, 2009
    Publication date: December 16, 2010
    Applicant: Mitsubishi Electric Corporation
    Inventors: Shigeo Udagawa, Mitsuru Kirita, Makoto Koukuwano