Title:
弾性波フィルタ
Document Type and Number:
Japanese Patent JP7272762
Kind Code:
B2
Abstract:
To provide an acoustic wave filter that can reduce destruction due to electrostatic discharge.SOLUTION: An acoustic wave filter 20 comprises: a piezoelectric substrate 1; an input terminal 2 and an output terminal 3; a ground pattern 8; and a plurality of resonators. A resonator 4A1 on the side of the input terminal 2 has an IDT electrode 5 including a first bus bar, a plurality of first electrode fingers, a second bus bar, and a plurality of second electrode fingers, and reflectors 6 arranged on both sides of the IDT electrode 5 and connected to the ground pattern 8. The IDT electrode 5 has a plurality of first dummy electrode fingers facing the plurality of second electrode fingers on the first bus bar, and a plurality of second dummy electrode fingers facing the plurality of first electrode fingers on the second bus bar. The reflectors 6 face a first dummy electrode and the second electrode finger located closest to the reflectors 6.SELECTED DRAWING: Figure 2
Inventors:
Yuji Mori
Application Number:
JP2018153761A
Publication Date:
May 12, 2023
Filing Date:
August 18, 2018
Export Citation:
Assignee:
Kyocera Corporation
International Classes:
H03H9/64; H03H9/145
Domestic Patent References:
| JP11136086A | ||||
| JP2012065272A |
Foreign References:
| WO2016121818A1 | ||||
| WO2018021242A1 |
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