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. 23, 2010
Filed:
Apr. 29, 2004
Applicants:
Yasuhide Iwamoto, Kawasaki, JP;
Shogo Inoue, Kawasaki, JP;
Jun Tsutsumi, Kawasaki, JP;
Inventors:
Assignees:
Fujitsu Media Devices Limited, Yokohama, JP;
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B 1/40 (2006.01);
U.S. Cl.
CPC ...
Abstract
A duplexer includes two surface acoustic wave (SAW) filters having different center frequencies; a phase matching circuit that matches phases of the two SAW filters; a package in which the SAW filters and the phase matching circuit are housed, the package being composed of multiple layers; and a line pattern provided between at least one of the SAW filters and at least one of a transmit terminal and a receive terminal of the duplexer. The line pattern runs on at least two of the multiple layers within a range defined by peripheral ground patterns provided in the package.