Title:
ELASTIC WAVE FILTER
Document Type and Number:
WIPO Patent Application WO/2022/091582
Kind Code:
A1
Abstract:
This elastic wave filter (1) comprises a radar circuit (11) having a series arm resonator (11s) and a parallel arm resonator (11p), a radar circuit (12) having a series arm resonator (12s) and a parallel arm resonator (12p), and a radar circuit (13) having a series arm resonator (13s) and a parallel arm resonator (13p). The radar circuit (11), the radar circuit (12), and the radar circuit (13) are cascade-connected in the stated order. The antiresonance frequency (fas1) of the series arm resonator (11s), the antiresonance frequency (fas2) of the series arm resonator (12s), the antiresonance frequency (fas3) of the series arm resonator (13s), the resonance frequency (frp1) of the parallel arm resonator (11p), the resonance frequency (frp2) of the parallel arm resonator (12p), and the resonance frequency (frp3) of the parallel arm resonator (13p) satisfy the expression fas1>fas2>fas3>frp1>frp2>frp3.
Inventors:
MORI HIROTSUGU (JP)
KIDO SYUNSUKE (JP)
KIDO SYUNSUKE (JP)
Application Number:
PCT/JP2021/032738
Publication Date:
May 05, 2022
Filing Date:
September 06, 2021
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H03H9/54; H03H9/64
Domestic Patent References:
| WO2015198709A1 | 2015-12-30 | |||
| WO2017159834A1 | 2017-09-21 | |||
| WO2019188864A1 | 2019-10-03 | |||
| WO2020036100A1 | 2020-02-20 |
Foreign References:
| JPS53105156A | 1978-09-13 | |||
| JP2003243966A | 2003-08-29 |
Attorney, Agent or Firm:
YOSHIKAWA, Shuichi et al. (JP)
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