Title:
METHOD FOR ADJUSTING RESONANT FREQUENCY, AND FILTER, MULTIPLEXER, AND COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/185258
Kind Code:
A1
Abstract:
A method for adjusting the resonant frequency of a filter, a filter, a multiplexer, and a communication device, which are beneficial to better matching of the full passband and the out-of-band of the filter. In the method, the frequency of some resonators is adjusted by adding mass loads to some series resonators and some parallel resonators, so that the whole passband of the filter can be well matched, and the out-of-band of the filter has a proper impedance value.
Inventors:
CAI HUALIN (CN)
PANG WEI (CN)
PANG WEI (CN)
Application Number:
PCT/CN2021/081139
Publication Date:
September 23, 2021
Filing Date:
March 16, 2021
Export Citation:
Assignee:
ROFS MICROSYSTEM TIANJIN CO LTD (CN)
International Classes:
H03B5/04; H03H9/02
Foreign References:
| CN111371407A | 2020-07-03 | |||
| CN110798166A | 2020-02-14 | |||
| CN110798168A | 2020-02-14 | |||
| CN110798169A | 2020-02-14 | |||
| CN108173528A | 2018-06-15 | |||
| US20150214923A1 | 2015-07-30 |
Attorney, Agent or Firm:
CHINA SMART INTELLECTUAL PROPERTY LTD. (CN)
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