Patents by Inventor Osami Ishida

Osami Ishida 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).

  • Antenna device having a band pass filter
    Patent number: 5684492
    Abstract: In order to perform feeding to an inverted F antenna having a plate conductor of an approximately rectangular shape for forming a radiation conductor and a ground conductor arranged in parallel with the plate conductor, a strip conductor plate connected to a feeder line is provided on the ground conductor via a dielectric substrate. Hence, the feeding from the feeder line to the inverted F antenna 37 is performed by an electric field coupling of the plate conductor and the strip conductor plate. The inverted F antenna and a resonator are integrated by coupling means to carry out an impedance matching, and the inverted F antenna and the resonator 62 constitute a band pass filter.
    Type: Grant
    Filed: March 1, 1995
    Date of Patent: November 4, 1997
    Assignees: Mitsubishi Denki Kabushiki Kaisha, Nippon Telegraph & Telephone Corporation
    Inventors: Kenichi Kagoshima, Koichi Tsunekawa, Moriyasu Miyazaki, Hideki Asao, Osami Ishida, Makoto Matsunaga, Takashi Katagi
  • Inverted F antenna with non-contact feeding
    Patent number: 5434579
    Abstract: In order to perform feeding to an inverted F antenna having a plate conductor of an approximately rectangular shape for forming a radiation conductor and a ground conductor arranged in parallel with the place conductor, a strip conductor plate connected to a feeder line is provided on the ground conductor via a dielectric substrate. Hence, the feeding from the feeder line to the inverted F antenna 37 is performed by an electric field coupling of the plate conductor and the strip conductor plate. The inverted F antenna and a resonator are integrated by coupling means to carry out an impedance matching, and the inverted F antenna and the resonator 62 constitute a band pass filter.
    Type: Grant
    Filed: November 23, 1992
    Date of Patent: July 18, 1995
    Assignees: Mitsubishi Denki Kabushiki Kaisha, Telephone Corporation, Nippon Telegraph
    Inventors: Kenichi Kagoshima, Koichi Tsunekawa, Moriyasu Miyazaki, Hideki Asao, Osami Ishida, Makoto Matsunaga, Takashi Katagi
  • Directional coupler
    Patent number: 4607240
    Abstract: A directional coupler having a main line and an auxiliary line each formed within a groove formed in a dielectric plate, having good directivity and capable of tight coupling.
    Type: Grant
    Filed: December 20, 1984
    Date of Patent: August 19, 1986
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yoji Isota, Osami Ishida, Fumio Takeda
  • Crossed waveguide type polarization separator
    Patent number: 4490696
    Abstract: A crossed waveguide type polarization separator comprises a crossed waveguide for propagating orthogonal linear polarized waves, at least one conductor septum fitted in the crossed waveguide to totally reflect only one polarized wave in the linear polarized waves, at least one subwaveguide for receiving one linear polarized wave formed by the total reflection of the conductor septum, and a waveguide for receiving the other linear polarized wave which is not reflected by the conductor septum.
    Type: Grant
    Filed: December 9, 1981
    Date of Patent: December 25, 1984
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Fumio Takeda, Osami Ishida, Yoji Isoda
  • Antenna feed system
    Patent number: 4345255
    Abstract: Each of a transmitter and a receiver connected to an antenna through a duplexer includes a .pi./2 and a .pi. polarizer and an ortho-mode transducer (OMT) serially interconnected. In the receiver the OMT is connected at one output to a branching circuit and at the other output to a coupler which is connected to the branching circuit through a transfer circuit. In the transmitter, the OMT is connected at one input to a branching circuit and at the other input to a coupler subsequently connected to the branching circuit through a transfer circuit.
    Type: Grant
    Filed: December 19, 1979
    Date of Patent: August 17, 1982
    Assignees: Kokusai Denshin Denwa Co., Ltd., Mitsubishi Denki Kabushiki Kaisha
    Inventors: Keigo Komuro, Matsuichi Yamada, Katsuhiko Aoki, Yoshihiko Yoshikawa, Fumio Itoh, Fumio Takeda, Osami Ishida