Title:
MULTIPLEXER, HIGH-FREQUENCY MODULE, AND COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/091726
Kind Code:
A1
Abstract:
This multiplexer (10) comprises filters (11 and 12) connected to an antenna connection terminal (100). The filter (11) comprises a first serial arm resonator and a first parallel arm resonator. Each of the first serial arm resonator and the first parallel arm resonator has a lower electrode (111), an upper electrode (113), and a piezoelectric layer (112). The resonator of at least one of the first serial arm resonator and the first parallel arm resonator comprises serial divided resonators (41a and 41b). The filter (12) comprises a plurality of second serial arm resonators and second parallel arm resonators, each of the plurality of second serial arm resonators and second parallel arm resonators has a lower electrode (111), an upper electrode (113), and a piezoelectric layer (112), and the upper electrodes (113) or the lower electrodes (111) of each of two adjacent serial arm resonators (45 and 46) among the plurality of second serial arm resonators are formed from a single electrode.
Inventors:
MORI HIROTSUGU (JP)
KIDO SYUNSUKE (JP)
KIDO SYUNSUKE (JP)
Application Number:
PCT/JP2021/036990
Publication Date:
May 05, 2022
Filing Date:
October 06, 2021
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H04B1/00; H03H9/17; H03H9/54; H03H9/70; H04B1/10; H04B1/40
Domestic Patent References:
| WO2019131501A1 | 2019-07-04 |
Foreign References:
| JP2008085989A | 2008-04-10 | |||
| JP2019154031A | 2019-09-12 | |||
| JP2020167445A | 2020-10-08 | |||
| US20190386641A1 | 2019-12-19 |
Attorney, Agent or Firm:
YOSHIKAWA, Shuichi et al. (JP)
Download PDF: