Patents by Inventor Keiichi NATSUHARA

Keiichi NATSUHARA 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).

  • Two-port triplate-line/waveguide converter having two probes with tips extending in different directions
    Patent number: 10003117
    Abstract: A two-port triplate-line/waveguide converter in one embodiment of this invention is provided with a rectangular waveguide and two probes that connect to central conductors of separate trip late lines via slits, said slits being formed separately on two opposing inside walls of the rectangular waveguide and lying on an imaginary straight line that is perpendicular to said inside walls. The two probes, the tips of which are bent inside the rectangular waveguide, constitute monopole antennas with the aforementioned inside walls functioning as the ground planes thereof.
    Type: Grant
    Filed: May 23, 2014
    Date of Patent: June 19, 2018
    Assignee: JAPAN RADIO CO., LTD.
    Inventors: Keiichi Natsuhara, Yusuke Kato, Katsuyoshi Ishida, Kiyomi Okawa, Takeshi Oga, Yuzo Shibuya, Kazufumi Igarashi
  • Feed line comprised of a triplate line coupled between a waveguide/triplate line converter and patch antennas for optimizing signals through the feed line
    Patent number: 9979066
    Abstract: A feed line in the form of a trip late line that runs from a waveguide/triplate-line converter coupled to a radio to a plurality of patch antennas in a cluster pattern. The width and length of a section of said feed line between the waveguide/triplate-line converter and the branch point nearest thereto are set such that the impedance of said section directly matches the parallel combination of the impedances of branches beyond said branch point and the loss in said section is kept to or below a predetermined upper limit.
    Type: Grant
    Filed: May 20, 2014
    Date of Patent: May 22, 2018
    Assignee: JAPAN RADIO CO., LTD.
    Inventors: Keiichi Natsuhara, Katsuyoshi Ishida, Kazuaki Yoshida, Kiyomi Okawa, Hiroshi Itoh, Takeshi Oga, Kazufumi Igarashi
  • TWO-PORT TRIPLATE-LINE/WAVEGUIDE CONVERTER
    Publication number: 20160141740
    Abstract: A two-port triplate-line/waveguide converter in one embodiment of this invention is provided with a rectangular waveguide and two probes that connect to central conductors of separate trip late lines via slits, said slits being formed separately on two opposing inside walls of the rectangular waveguide and lying on an imaginary straight line that is perpendicular to said inside walls. The two probes, the tips of which are bent inside the rectangular waveguide, constitute monopole antennas with the aforementioned inside walls functioning as the ground planes thereof.
    Type: Application
    Filed: May 23, 2014
    Publication date: May 19, 2016
    Inventors: Keiichi NATSUHARA, Yusuke KATO, Katsuyoshi ISHIDA, Kiyomi OKAWA, Takeshi OGA, Yuzo SHIBUYA, Kazufumi IGARASHI
  • FEED LINE
    Publication number: 20160141741
    Abstract: A feed line in the form of a trip late line that runs from a waveguide/triplate-line converter coupled to a radio to a plurality of patch antennas in a cluster pattern. The width and length of a section of said feed line between the waveguide/triplate-line converter and the branch point nearest thereto are set such that the impedance of said section directly matches the parallel combination of the impedances of branches beyond said branch point and the loss in said section is kept to or below a predetermined upper limit.
    Type: Application
    Filed: May 20, 2014
    Publication date: May 19, 2016
    Inventors: Keiichi NATSUHARA, Katsuyoshi ISHIDA, Kazuaki YOSHIDA, Kiyomi OKAWA, Hiroshi ITOH, Takeshi OGA, Kazufumi IGARASHI