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:
May. 30, 2006
Filed:
Apr. 19, 2004
Applicants:
Yasuhide Iwamoto, Kawasaki, JP;
Takashi Matsuda, Kawasaki, JP;
Inventors:
Yasuhide Iwamoto, Kawasaki, JP;
Takashi Matsuda, Kawasaki, JP;
Assignees:
Fujitsu Media Devices, Limited, Yokohama, JP;
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03H 9/72 (2006.01); H03H 9/64 (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 having a die-attached layer on which a chip of the SAW filters is facedown mounted, and ground line patterns provided on the die-attached layer and an underlying layer that underlies the die-attached layer, the ground line patterns forming inductances.