Title:
HIGH-FREQUENCY FILTER AND MULTIPLEXER
Document Type and Number:
WIPO Patent Application WO/2023/032942
Kind Code:
A1
Abstract:
A high-frequency filter (1) comprises: a filter circuit part (10) provided to a first route (r1) between a first signal electrode (T10) and a second signal electrode (T20); and an addition circuit part (20) provided to a second route (r2) in parallel with at least a portion of the first route (r1). The filter circuit part (10) has: series arm resonators (S1-S4); parallel arm resonators (P1-P4); and an inductor (L1) provided to a route that connects a ground and some or all of the parallel arm resonators. A plurality of elastic wave resonators of the addition circuit part (20) have first electrodes (31a-34a) and second electrodes (31b-34b). The first electrodes (31a-34a) are connected to the second route (r2). The second electrodes (31b-34b) are connected to a connection conductor on a route that connects the inductor (L1) and some or all of the parallel arm resonators (P1-P3).
Inventors:
TAKATA TOSHIAKI (JP)
Application Number:
PCT/JP2022/032489
Publication Date:
March 09, 2023
Filing Date:
August 30, 2022
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H03H9/64; H03H9/145; H03H9/25; H03H9/72
Domestic Patent References:
| WO2021149332A1 | 2021-07-29 | |||
| WO2018088153A1 | 2018-05-17 | |||
| WO2019107280A1 | 2019-06-06 |
Foreign References:
| JP2018078489A | 2018-05-17 |
Attorney, Agent or Firm:
YOSHIKAWA, Shuichi et al. (JP)
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