Patents by Inventor Makoto Kijima

Makoto Kijima 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).

  • Broadband antenna using a semicircular radiator
    Patent number: 5872546
    Abstract: In a broadband antenna using a semicircular conductor disc, a semicircular cutout is formed in the semicircular radiator concentrically therewith. Alternatively, a semicircular arcwise radiating conductor with a semicircular cutout defined concentrically therewith is bent into a cylindrical shape to form a radiator.
    Type: Grant
    Filed: September 17, 1996
    Date of Patent: February 16, 1999
    Assignee: NTT Mobile Communications Network Inc.
    Inventors: Taisuke Ihara, Koichi Tsunekawa, Makoto Kijima
  • Multibeam antenna devices
    Patent number: 5686926
    Abstract: Two beams with equiangular spacing are formed at a single antenna face, and multiple beams are generated by combining a plurality of such faces. This makes it possible to reduce the size of an antenna device and to decrease the wind load sustained by an antenna, whereby it becomes possible to mount many antennas on a single supporting structure and to achieve substantial weight reduction of a supporting structure.
    Type: Grant
    Filed: September 11, 1996
    Date of Patent: November 11, 1997
    Assignee: NTT Mobile Communications Network Inc.
    Inventors: Makoto Kijima, Yoshihide Yamada, Yoshio Ebine, Minoru Kuramoto