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:
Jul. 15, 2008
Filed:
Jul. 28, 2004
Nobuo Fuse, Osaka, JP;
Nobuo Fuse, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A surface acoustic wave device has a structure in which a surface acoustic wave element (), provided with two kinds of surface acoustic wave filter structures having different center frequencies on the same piezoelectric substrate (), is disposed on a package (). The surface acoustic wave element () comprises a first filter structure () having a first center frequency, a second filter structure () having a second center frequency and a shield electrode () between the first filter structure () and the second filter structure (). The shield electrode () is connected to an earth terminal () of the package () to be grounded. According to the structure, electromagnetic shielding between the first filter structure () and the second filter structure () can be performed, therefore, the isolation property therebetween can be improved and the surface acoustic wave device can be miniaturized.