Title:
MULTIPLEXER, HIGH-FREQUENCY FRONT-END CIRCUIT, AND COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/111902
Kind Code:
A1
Abstract:
A multiplexer (1) is provided with: a transmission-side filter (10) connected to a common terminal (90) and a transmission input terminal (91); and a transmission-side filter (12) connected to the common terminal (90) and a transmission input terminal (93). The transmission-side filter (10) is provided with a plurality of series arm resonators (101-104), and a plurality of parallel arm resonators (201-203). Capacitive elements (C1, C2) are connected in parallel to a series arm resonator (101) and a parallel arm resonator (201), respectively, which are connected the closest to the common terminal (90). IDT electrodes of the series arm resonator (101) and the parallel arm resonator (201) do not include thinned electrodes. The series arm resonators (102-104) and the parallel arm resonators (202, 203) do include thinned electrodes.
Inventors:
TAKAMINE YUICHI (JP)
Application Number:
PCT/JP2018/044589
Publication Date:
June 13, 2019
Filing Date:
December 04, 2018
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H03H9/72; H03H9/64
Domestic Patent References:
| WO2010122786A1 | 2010-10-28 | |||
| WO2014034492A1 | 2014-03-06 | |||
| WO2016111315A1 | 2016-07-14 | |||
| WO2017043427A1 | 2017-03-16 |
Foreign References:
| JP2011146768A | 2011-07-28 | |||
| JP2014143675A | 2014-08-07 | |||
| JP2004023611A | 2004-01-22 |
Attorney, Agent or Firm:
YOSHIKAWA, Shuichi et al. (JP)
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