Title:
MULTIPLEXER, METHOD FOR IMPROVING ISOLATION OF MULTIPLEXER, AND COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/143982
Kind Code:
A1
Abstract:
Disclosed are a multiplexer, a method for improving the isolation of a multiplexer, and a communication device, wherein there is better isolation between filters in the multiplexer. The multiplexer includes two or more filters connected in parallel, wherein each of the filters includes a plurality of piezoelectric acoustic wave resonators, and the piezoelectric acoustic wave resonators include grounded inductors. The multiplexer has at least one capacitive structure, two poles of the capacitive structure are respectively connected to distal ends of the two grounded inductors, the two grounded inductors belong to different filters, and there is mutual inductance between the two grounded inductors.
Inventors:
CAI HUALIN (CN)
PANG WEI (CN)
PANG WEI (CN)
Application Number:
PCT/CN2021/143682
Publication Date:
July 07, 2022
Filing Date:
December 31, 2021
Export Citation:
Assignee:
ROFS MICROSYSTEM TIANJIN CO LTD (CN)
International Classes:
H03H9/56; H03H9/02
Foreign References:
| CN112865741A | 2021-05-28 | |||
| CN111064447A | 2020-04-24 | |||
| CN102035490A | 2011-04-27 | |||
| JPWO2011065270A1 | 2013-04-11 | |||
| CN111384908A | 2020-07-07 | |||
| US20110018653A1 | 2011-01-27 | |||
| TW201406059A | 2014-02-01 |
Attorney, Agent or Firm:
CHINA SMART INTELLECTUAL PROPERTY LTD. (CN)
Download PDF: