Title:
ACOUSTIC WAVE FILTER, MULTIPLEXER, AND COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/089545
Kind Code:
A1
Abstract:
Disclosed in the present invention are an acoustic wave filter, a multiplexer, and a communication device. A plurality of series resonators and a plurality of parallel resonators are provided between the input end and the output end of the acoustic wave filter; each parallel branch has an inductor; the inductors are inductively coupled; and a capacitor is bridged between a pair of parallel branches of the filter; both ends of the capacitor are located between the resonators and the inductors in the parallel branches where the ends are located, respectively. The technical solution of the present invention facilitates improvement of the out-of-band suppression performance of the acoustic wave filter.
Inventors:
CAI HUALIN (CN)
Application Number:
PCT/CN2021/127106
Publication Date:
May 05, 2022
Filing Date:
October 28, 2021
Export Citation:
Assignee:
ROFS MICROSYSTEM TIANJIN CO LTD (CN)
International Classes:
H03H9/52
Foreign References:
| CN112350684A | 2021-02-09 | |||
| CN109787581A | 2019-05-21 | |||
| CN111313862A | 2020-06-19 | |||
| US20200083866A1 | 2020-03-12 | |||
| US6404302B1 | 2002-06-11 |
Attorney, Agent or Firm:
CHINA SMART INTELLECTUAL PROPERTY LTD. (CN)
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