Title:
FILTER, DUPLEXER, HIGH-FREQUENCY FRONT-END CIRCUIT, AND COMMUNICATION APPARATUS
Document Type and Number:
WIPO Patent Application WO/2021/147633
Kind Code:
A1
Abstract:
Disclosed are a filter (600), a duplexer, a high-frequency front-end circuit, and a communication apparatus. The filter (600) comprises a plurality of resonators connected in series (S11, S12, S13, S14) and a plurality of resonators connected in parallel (P11, P12, P13, P14), wherein some of the resonators connected in series (S11, S12, S13, S14) and/or some of the resonators connected in parallel (P11, P12, P13, P14) are temperature compensation resonators (TCF); and the temperature compensation resonators (TCF) each comprise a temperature compensation layer (55). A high roll-off requirement and a good temperature characteristic of the filter (600) are realized without affecting the bandwidth of the filter (600), and the minimum degradation of the insertion loss of the filter (600) is achieved while the temperature drift characteristic of the filter (600) is improved.
Inventors:
PANG WEI (CN)
BIAN ZIPENG (CN)
BIAN ZIPENG (CN)
Application Number:
PCT/CN2020/141264
Publication Date:
July 29, 2021
Filing Date:
December 30, 2020
Export Citation:
Assignee:
ROFS MICROSYSTEM TIANJIN CO LTD (CN)
International Classes:
H03H9/70; H03H9/54
Foreign References:
| CN111224641A | 2020-06-02 | |||
| CN109983695A | 2019-07-05 | |||
| US20130109332A1 | 2013-05-02 | |||
| CN103138032A | 2013-06-05 | |||
| CN101958696A | 2011-01-26 | |||
| CN102916674A | 2013-02-06 |
Attorney, Agent or Firm:
CHINA SMART INTELLECTUAL PROPERTY LTD. (CN)
Download PDF: