Patents by Inventor Shigehazu Ito

Shigehazu Ito 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).

  • Circularly polarized antenna apparatus and radio communication apparatus using the same
    Patent number: 6677902
    Abstract: A circularly polarized antenna apparatus includes a radiating electrode and a ground electrode which are provided on a dielectric substrate. A degeneracy-splitting elements is also provided on the substrate to cause two resonant currents split between degenerate modes to be excited in the radiating electrode. The radiating electrodes includes a primary radiating electrode on a principal surface of the substrate, and secondary radiating electrode on side surfaces of the substrate, thus increasing the area of the radiating electrode. Therefore, the conductor loss of the primary radiating electrode is reduced and the antenna gain is increased.
    Type: Grant
    Filed: May 30, 2002
    Date of Patent: January 13, 2004
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Hisashi Akiyama, Kazunari Kawahata, Shigehazu Ito
  • Circularly polarized antenna apparatus and radio communication apparatus using the same
    Publication number: 20030058175
    Abstract: A circularly polarized antenna apparatus includes a radiating electrode and a ground electrode which are provided on a dielectric substrate. A degeneracy-splitting elements is also provided on the substrate to cause two resonant currents split between degenerate modes to be excited in the radiating electrode. The radiating electrodes includes a primary radiating electrode on a principal surface of the substrate, and secondary radiating electrode on side surfaces of the substrate, thus increasing the area of the radiating electrode. Therefore, the conductor loss of the primary radiating electrode is reduced and the antenna gain is increased.
    Type: Application
    Filed: May 30, 2002
    Publication date: March 27, 2003
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Hisashi Akiyama, Kazunari Kawahata, Shigehazu Ito