Title:
ELASTIC WAVE FILTER
Document Type and Number:
WIPO Patent Application WO/2022/181578
Kind Code:
A1
Abstract:
This elastic wave filter (1) comprises: a filter circuit connected to input/output terminals (110 and 120); and a cancel circuit (10) connected in parallel with at least a portion of a first path connecting the input/output terminal (110) and the input/output terminal (120). The filter circuit has: one or more serial arm resonators arranged on the first path; and one or more parallel arm resonators arranged between the first path and the ground. The cancel circuit (10) has: elastic wave resonators (11 and 12) arranged side-by-side in the elastic wave propagation direction. At least one of the elastic wave resonators (11 and 12) is connected to the ground, and the antiresonance frequency of said at least one of the elastic wave resonators is present in the passband of the filter circuit.
Inventors:
NOGUCHI AKIRA (JP)
Application Number:
PCT/JP2022/007114
Publication Date:
September 01, 2022
Filing Date:
February 22, 2022
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H03H9/17; H03H9/64
Foreign References:
| JP2018088678A | 2018-06-07 | |||
| JP2021016116A | 2021-02-12 | |||
| JP2018078489A | 2018-05-17 |
Attorney, Agent or Firm:
YOSHIKAWA, Shuichi et al. (JP)
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