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:
Sep. 13, 2005
Filed:
Aug. 29, 2003
Applicant:
Mitsuo Takeda, Ishikawa-ken, JP;
Inventor:
Mitsuo Takeda, Ishikawa-ken, JP;
Assignee:
Murata Manufacturing Co., Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03H009/64 ; H03H009/72 ;
U.S. Cl.
CPC ...
Abstract
A surface acoustic wave filter includes multiple serial surface acoustic wave resonators and parallel surface acoustic wave resonators arranged in a ladder configuration between an input electrode pad and an output electrode pad on a piezoelectric substrate, and a grounded electrode pattern is arranged on the piezoelectric substrate so as to surround at least one of the input electrode pad and the output electrode pad. This provides a small-sized surface acoustic wave filter with improved attenuation near the pass band on the high-frequency side.