Invention Grant
- Patent Title: Ladder-type surface acoustic wave filter and duplexer including the same
- Patent Title (中): 梯形声表面波滤波器和双工器包括相同
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Application No.: US13774811Application Date: 2013-02-22
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Publication No.: US09203376B2Publication Date: 2015-12-01
- Inventor: Tetsuya Tsurunari , Joji Fujiwara , Hiroyuki Nakamura , Hidekazu Nakanishi
- Applicant: SKYWORKS PANASONIC FILTER SOLUTIONS JAPAN CO., LTD.
- Applicant Address: JP Kadoma-Shi
- Assignee: SKYWORKS PANASONIC FILTER SOLUTIONS JAPAN CO., LTD.
- Current Assignee: SKYWORKS PANASONIC FILTER SOLUTIONS JAPAN CO., LTD.
- Current Assignee Address: JP Kadoma-Shi
- Agency: Lando & Anastasi, LLP
- Priority: JP2011-139080 20110623
- Main IPC: H03H9/72
- IPC: H03H9/72 ; H03H9/64 ; H03H9/02
Abstract:
A ladder-type surface acoustic wave filter includes a first series resonator having the lowest resonance frequency among a plurality of series resonators; and a second series resonator having a resonance frequency higher than the first series resonator. The film thickness of a dielectric film in the region where the first series resonator is formed is larger than that of a dielectric film in the region where the second series resonator is formed.
Public/Granted literature
- US20130162368A1 LADDER-TYPE SURFACE ACOUSTIC WAVE FILTER AND DUPLEXER INCLUDING THE SAME Public/Granted day:2013-06-27
Information query
IPC分类:
