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. 01, 2007
Filed:
Sep. 12, 2006
Masakazu Mimura, Ritto, JP;
Tomohisa Komura, Yasu, JP;
Norio Taniguchi, Otsu, JP;
Takeshi Nakao, Omihachiman, JP;
Michio Kadota, Kyoto, JP;
Masakazu Mimura, Ritto, JP;
Tomohisa Komura, Yasu, JP;
Norio Taniguchi, Otsu, JP;
Takeshi Nakao, Omihachiman, JP;
Michio Kadota, Kyoto, JP;
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
A surface acoustic wave branching filter includes a first filter and a second filter each including a plurality of surface acoustic wave resonators arranged in a ladder circuit configuration. The first filter in which the frequency range of the passband is relatively low is provided on a first piezoelectric substrate, and the second filter in which the frequency range of the passband is relatively high is provided on a second piezoelectric substrate. The first piezoelectric substrate and the second piezoelectric substrate are rotation Y-cut X-propagation LiTaOsubstrates, and the cut angle of the first piezoelectric substrate is greater than the cut angle of the second piezoelectric substrate.