Patents by Inventor Sinichi Fujimoto

Sinichi Fujimoto 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).

  • Microwave circuit and method of manufacturing microwave circuit
    Patent number: 6104240
    Abstract: A microwave circuit having a coupler with two microstrip conductors on a front surface of a substrate, parallel to each other, and electromagnetically coupled to each other with a coupling coefficient wherein the substrate has a rear surface on which a grounding conductor is formed. A floating conductor is interposed between the microstrip conductors. A first terminal of a switching device is connected to one end of the floating conductor while a second terminal of the switching device is grounded. By selectively turning on and off the switching device, the coupling coefficient is changed.
    Type: Grant
    Filed: December 24, 1998
    Date of Patent: August 15, 2000
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Sinichi Fujimoto, Yoshinobu Sasaki