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Title:
ELASTIC WAVE DEVICE, FILTER DEVICE, AND MULTIPLEXER
Document Type and Number:
WIPO Patent Application WO/2021/060153
Kind Code:
A1
Abstract:
Provided is an elastic wave device that makes it possible to suppress IMD and to suppress degradation of reception sensitivity. An elastic wave device 1 that comprises a piezoelectric substrate 2, a first IDT electrode 3, reflectors 4A, 4B that are provided on either side of the first IDT electrode 3 in an elastic wave propagation direction, and a second IDT electrode 5 that is provided opposite the first IDT electrode 3 so as to sandwich reflector 4A and that forms a second IDT 5A. The first and second IDT electrodes 3, 5 have first and second interdigitated regions A, B in which a plurality of electrode fingers overlap in the elastic wave propagation direction. The first and second interdigitated regions A, B overlap in the elastic wave propagation direction. A third busbar 16 of the second IDT electrode 5 is connected to a first busbar 12 of the first IDT electrode 3, and a fourth busbar 17 of the second IDT electrode 5 is connected to a ground potential. The resonant frequency of the portion formed by the second IDT electrode 5 is included in the frequency band of a disturbance wave signal.

Inventors:
TANIGUCHI YASUMASA (JP)
DAIMON KATSUYA (JP)
TAKAI TSUTOMU (JP)
Application Number:
PCT/JP2020/035314
Publication Date:
April 01, 2021
Filing Date:
September 17, 2020
Export Citation:
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Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H03H9/145; H03H9/25; H03H9/64; H03H9/72
Domestic Patent References:
WO2014196245A12014-12-11
WO2019177028A12019-09-19
WO2013061694A12013-05-02
Foreign References:
JP2014013959A2014-01-23
Attorney, Agent or Firm:
MIYAZAKI & METSUGI (JP)
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