Title:
ELASTIC WAVE RESONATOR, ELASTIC WAVE FILTER DEVICE, AND MULTIPLEXER
Document Type and Number:
WIPO Patent Application WO/2023/074373
Kind Code:
A1
Abstract:
In the present invention, an elastic wave resonator (10) comprises an IDT electrode (11), a first reflector (31), and a second reflector (32). The IDT electrode (11) has a plurality of comb-toothed electrode fingers (11a, 11b). The first reflector (31) has a plurality of first reflecting electrode fingers (31a), and the second reflector (32) has a plurality of second reflecting electrode fingers (32a). A first reflector wavelength (λr1), which is double the pitch (pr1) in which the plurality of first reflecting electrode fingers (31a) are arranged, is greater than a second reflector wavelength (λr2), which is double the pitch (pr2) in which the plurality of second reflecting electrode fingers (32a) are arrranged. A first IDT-reflector gap (g1), which is the distance between the center of the comb-toothed electrode finger that is closest to the first reflector (31) and the center of the first reflecting electrode finger that is closest to the IDT electrode (11), is smaller than a second IDT-reflector gap (g2), which is the distance between the center of the comb-toothed electrode finger that is closest to the second reflector (32) and the center of the second reflecting electrode finger that is closest to the IDT electrode (11).
Inventors:
ISHITAKI MASAYUKI (JP)
Application Number:
PCT/JP2022/038059
Publication Date:
May 04, 2023
Filing Date:
October 12, 2022
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H03H9/145; H03H9/25; H03H9/64; H03H9/72
Domestic Patent References:
| WO2019177028A1 | 2019-09-19 |
Foreign References:
| JPH10215145A | 1998-08-11 | |||
| JPH10215144A | 1998-08-11 | |||
| JPH08181565A | 1996-07-12 |
Attorney, Agent or Firm:
YOSHIKAWA, Shuichi et al. (JP)
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