Invention Grant
US08228138B2 Filter element, duplexer and electronic device having piezoelectric thin-film resonators stacked vertically
失效
具有垂直堆叠的压电薄膜谐振器的滤波器元件，双工器和电子器件
- Patent Title: Filter element, duplexer and electronic device having piezoelectric thin-film resonators stacked vertically
- Patent Title (中): 具有垂直堆叠的压电薄膜谐振器的滤波器元件，双工器和电子器件
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Application No.: US13177797Application Date: 2011-07-07
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Publication No.: US08228138B2Publication Date: 2012-07-24
- Inventor: Motoaki Hara , Shinji Taniguchi , Takeshi Sakashita , Tsuyoshi Yokoyama , Masafumi Iwaki , Tokihiro Nishihara , Masanori Ueda
- Applicant: Motoaki Hara , Shinji Taniguchi , Takeshi Sakashita , Tsuyoshi Yokoyama , Masafumi Iwaki , Tokihiro Nishihara , Masanori Ueda
- Applicant Address: JP Tokyo
- Assignee: Taiyo Yuden Co., Ltd.
- Current Assignee: Taiyo Yuden Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Chen Yoshimura LLP
- Main IPC: H03H9/54
- IPC: H03H9/54 ; H03H9/70
Abstract:
A filter element includes a plurality of multilayer filters that are connected in cascade, each of the plurality of multilayer filters including a plurality of piezoelectric thin-film resonators stacked vertically, each of the piezoelectric thin-film resonators including a piezoelectric film and a pair of first electrodes between which the piezoelectric film is interposed, and a capacitor connected between an input terminal of one of the plurality of multilayer filters of a preceding stage and an input terminal of another one of the plurality of multilayer filters of a following stage, exciting directions of piezoelectric thin-film resonators to which the input terminals of the multilayer filters of the preceding and following stages are connected being opposite to each other.
Public/Granted literature
- US20110267155A1 FILTER ELEMENT, DUPLEXER AND ELECTRONIC DEVICE Public/Granted day:2011-11-03
Information query
IPC分类:
