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:
Oct. 12, 2010
Filed:
Jun. 06, 2008
Hiroyuki Nakamura, Osaka, JP;
Tetsuya Tsurunari, Osaka, JP;
Ken Matsunami, Osaka, JP;
Hidekazu Nakanishi, Osaka, JP;
Hiroyuki Nakamura, Osaka, JP;
Tetsuya Tsurunari, Osaka, JP;
Ken Matsunami, Osaka, JP;
Hidekazu Nakanishi, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A surface acoustic wave filter includes a piezoelectric substrate including lithium niobate, a series resonator including a first interdigital transducer electrode provided on the piezoelectric substrate, and a parallel resonator including a second interdigital transducer electrode provided on the piezoelectric substrate and being electrically connected to the series resonator. An apodized weighting factor of the first interdigital transducer electrode is smaller than an apodized weighting factor of the second interdigital transducer electrode. This surface acoustic wave filter has a small loss.