Patents by Inventor Kazuo Kosukegawa

Kazuo Kosukegawa 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).

  • Patent number: 5281974
    Abstract: In an antenna device comprising an antenna block which can electrically control a direction of a radio wave transmitted or received by the antenna device, a phase shift unit is connected to the antenna block to phase shift an external electric signal or an internal electric signal given to or from the antenna device. The phase shift unit has variable and discrete phase shifts switched from one to another in response to a control signal supplied from a controller and supplies a phase shifted external signal to the antenna block or a phase shifted internal signal to an external device. The antenna block comprises a plurality of antenna elements and a plurality of phase shifters which are connected to the antenna elements to send the phase shifted external signal to the respective antenna elements or to send the internal electric signal to the phase shift unit.
    Type: Grant
    Filed: July 21, 1992
    Date of Patent: January 25, 1994
    Assignee: NEC Corporation
    Inventors: Akio Kuramoto, Toshinobu Yamane, Osamu Ichiyoshi, Kazuo Kosukegawa
  • Patent number: 4897663
    Abstract: A horn antenna for radiating or receiving a microwave is provided with a plurality of axially spaced radial fins fixedly mounted on the outer surface of the horn, which fins form a plurality of radial grooves and a front axial groove each having a depth of approximately equal to a quarter of a wavelength of the microwave. Those fins and grooves form a choke surface-wave structure which improves the radiation pattern and reduces undesired radiation and side lobe. A multimode horn arrangement for a higher frequency wave is employed for the horn so that two different frequency waves are efficiently radiated or received at a single horn antenna with a reduced side lobe and an excellent cross polarization characteristic.
    Type: Grant
    Filed: December 24, 1986
    Date of Patent: January 30, 1990
    Assignee: NEC Corporation
    Inventors: Mitsuhiro Kusano, Kazuo Kosukegawa, Kazuhiko Kurokawa