Title:
MULTIPLEXER, HIGH-FREQUENCY FRONT END CIRCUIT, AND COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/017422
Kind Code:
A1
Abstract:
This multiplexer (1) is provided with a reception-side filter (12) and a reception-side filter (14) having a higher pass band frequency than the reception-side filter (12), wherein: the reception-side filter (12) has a serial arm resonator (101) disposed on a first path and parallel arm resonators (151-153) disposed on a path connecting the first path and the ground; the direction D of connecting tips of a plurality of electrode fingers that constitute each of the resonators crosses the elastic wave propagation direction at a predetermined angle; and the parallel arm resonator (151) closest to a common connection electrode (50) does not include a third electrode finger (atypical finger), while the other parallel arm resonators (152, 153) include the third electrode finger (atypical finger).
Inventors:
TAKAMINE YUICHI (JP)
Application Number:
PCT/JP2018/027060
Publication Date:
January 24, 2019
Filing Date:
July 19, 2018
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H03H9/72; H03H9/145; H03H9/25
Domestic Patent References:
| WO2015064238A1 | 2015-05-07 | |||
| WO2015182522A1 | 2015-12-03 | |||
| WO2016208670A1 | 2016-12-29 | |||
| WO2018003273A1 | 2018-01-04 |
Foreign References:
| JP2011182220A | 2011-09-15 | |||
| JP2016119569A | 2016-06-30 |
Attorney, Agent or Firm:
YOSHIKAWA, Shuichi et al. (JP)
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