Patents by Inventor Tooru KANEHIRA

Tooru KANEHIRA 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).

  • Branch-line directional coupler and power amplifier device
    Patent number: 11133566
    Abstract: A branch line directional coupler has a first line, a second line, a first open-ended coupled circuit, and a second open-ended coupled circuit. The first and second lines have a first characteristic impedance and a quarter wavelength length. The first open-ended coupled line has one end connected to the first line and the other end connected to the second line. The second open-ended coupled line has one end connected to the first line and the other end connected to the second line. The first open-ended coupled line has two coupled lines having a coupling length of a quarter wavelength, an open stub, and a connecting line, and has a total length of one-half wavelength. The second open-ended coupled line includes two coupled lines having a coupling length of ¼-wavelength, open stubs, and a connecting line, and has a total length of ½-wavelength.
    Type: Grant
    Filed: July 16, 2019
    Date of Patent: September 28, 2021
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA INFRASTRUCTURE SYSTEMS & SOLUTIONS CORPORATION
    Inventor: Tooru Kanehira
  • BRANCH-LINE DIRECTIONAL COUPLER AND POWER AMPLIFIER DEVICE
    Publication number: 20200266517
    Abstract: A branch line directional coupler has a first line, a second line, a first open-ended coupled circuit, and a second open-ended coupled circuit. The first and second lines have a first characteristic impedance and a quarter wavelength length. The first open-ended coupled line has one end connected to the first line and the other end connected to the second line. The second open-ended coupled line has one end connected to the first line and the other end connected to the second line. The first open-ended coupled line has two coupled lines having a coupling length of a quarter wavelength, an open stub, and a connecting line, and has a total length of one-half wavelength. The second open-ended coupled line includes two coupled lines having a coupling length of ¼-wavelength, open stubs, and a connecting line, and has a total length of ½-wavelength.
    Type: Application
    Filed: July 16, 2019
    Publication date: August 20, 2020
    Applicants: Kabushiki Kaisha Toshiba, Toshiba Infrastruture Systems & Solutions Corporation
    Inventor: Tooru KANEHIRA