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:
Aug. 24, 2004
Filed:
Jul. 30, 2002
Katsuhiro Ikada, Moriyama, JP;
Tatsuro Nagai, Kanazawa, JP;
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
A surface acoustic wave duplexer includes a branching section having a plurality of surface acoustic wave filters provided on a first electrode pattern on the front surface of a multi-layer substrate. An antenna terminal, a transmission terminal, and a receiving terminal are provided on peripheral portions of a fourth electrode pattern on the rear surface of the multi-layer substrate, and are connected to the branching section. A matching stripline disposed on a third electrode pattern in an intermediate layer of the multi-layer substrate, and connected to the antenna terminal is arranged such that it is grounded to at least one side other than the side opposite the side where the antenna terminal is located.