Title:
弾性波フィルタ、マルチプレクサ、高周波フロントエンド回路および通信装置
Document Type and Number:
Japanese Patent JP6773238
Kind Code:
B2
Abstract:
An acoustic wave filter includes a substrate having piezoelectricity, input/output terminals on the substrate, ground terminals on the substrate and separated from each other, and a longitudinally coupled resonator on the substrate and arranged on a path connecting the input/output terminals, in which each of IDT electrodes included in the longitudinally coupled resonator includes a pair of comb-shaped electrodes each of which is provided with a plurality of electrode fingers and a busbar electrode, the other of the pair of the comb-shaped electrodes included in the IDT electrode arranged at a position closest to the input/output terminal is connected to the ground terminal on the substrate, and the other of the pair of comb-shaped electrodes included in each of all the IDT electrodes other than the IDT electrode is connected to the ground terminal on the substrate.
Inventors:
Motoharu Takuma
Application Number:
JP2019561664A
Publication Date:
October 21, 2020
Filing Date:
December 21, 2018
Export Citation:
Assignee:
MURATA MANUFACTURING CO.,LTD.
International Classes:
H03H9/145; H03H9/64; H03H9/72
Domestic Patent References:
| JP201792945A |
Foreign References:
| WO2017208629A1 | ||||
| WO2016013330A1 |
Attorney, Agent or Firm:
Shuichi Yoshikawa
Masao Sakajima
Masao Sakajima