The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 17, 2012
Filed:
Mar. 15, 2004
Applicants:
Atsushi Fukuda, Yokohama, JP;
Hiroshi Okazaki, Yokosuka, JP;
Yasushi Yamao, Yokosuka, JP;
Tetsuo Hirota, Kanazawa, JP;
Inventors:
Atsushi Fukuda, Yokohama, JP;
Hiroshi Okazaki, Yokosuka, JP;
Yasushi Yamao, Yokosuka, JP;
Tetsuo Hirota, Kanazawa, JP;
Assignee:
NTT DoCoMo, Inc., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03H 7/38 (2006.01); H01P 7/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
A matching circuit including a main matching blockinserted in a signal path and a series matching block, one end of which is connected to the main matching block, in which one end of a series connection of a switchand a parallel matching blockis connected to the signal path at the other end of the series matching blockand impedance matching between input/output is performed at any one of two frequencies by setting the switch to ON/OFF.