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:
Mar. 16, 2004
Filed:
Dec. 20, 2002
Kenji Sumida, Osaka, JP;
Tomohiro Okumura, Kadoma, JP;
Yukihiro Maegawa, Ibaraki, JP;
Ichiro Nakayama, Kadoma, JP;
Kibatsu Shinohara, Yokohama, JP;
Minoru Kanda, Yokohama, JP;
Shiniti Matamura, Yokohama, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
The present invention provides a matching circuit which has a wide range in which matching can be achieved and the matched state of which is stabilized with respect to a change in the load state. To an input terminal ( ) of a matching circuit ( ), one terminal of a first variable reactance element ( ) is connected. The other terminal of the first variable reactance element ( ) is connected to a point between a first fixed reactance element ( ) and a second fixed reactance element ( ), which are connected in series. The first fixed reactance element ( ) is grounded, and the second fixed reactance element ( ) is connected to one terminal of a second variable reactance element ( ) and connected to one terminal of a stripline ( ). The other terminal of the second variable reactance element ( ) is grounded, and the other terminal of the stripline ( ) is connected to an output terminal ( ).