Patents by Inventor Yukikazu Arai

Yukikazu Arai 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).

  • Double-balanced mixer with triple-layer film transformers
    Patent number: 5280647
    Abstract: A multi-layered double-balanced mixer includes first and second transformers formed as first, second and third winding film layers separated by insulating films and stacked on one side of a substrate with first and second input/output electrode pairs connected to opposite ends of the second winding layers of the respective transformers. Diode electrodes of a four diode matrix are connected to one ends of the first and third winding layers. Third input/output electrodes are connected to second ends of the first and third winding layers of the first and second transformers. A film shield covers the first and second transformers and the diode matrix. First and second adjusting stubs are formed as film structures outside of the shield and are connected to a respective input/output electrodes of said first, second and third input/output electrodes for adjusting input impedances of the double-balanced mixer.
    Type: Grant
    Filed: May 23, 1991
    Date of Patent: January 18, 1994
    Assignee: Taisei Co., Ltd.
    Inventors: Yukikazu Arai, Haruo Kosuge, Masataka Osawa