Title:
MULTIPLEXER
Document Type and Number:
WIPO Patent Application WO/2022/009692
Kind Code:
A1
Abstract:
This multiplexer (1) is provided with a first filter and a second filter (2a and 2b) which share a common connection at a common terminal (3); the passband of the second filter (2b) overlaps, at least partially, with a band 0.75-0.8 times the passband of the first filter (2a); and among a plurality of elastic wave resonators provided in the first filter (2a), a first elastic wave resonator connected nearest to the common terminal (3) satisfies at least one of the conditions (i), (ii) and (iii) below. (i) The repeat pitch of the reflector / the repeat pitch of the IDT electrode ≥ 1.01. (ii) The distance between the IDT electrode and the reflector > the repeat pitch of the reflector. (iii) The number of pairs of the plurality of electrode fingers of the IDT electrode ≤ 50 pairs.
Inventors:
KOMURA TOMOHISA (JP)
Application Number:
PCT/JP2021/024085
Publication Date:
January 13, 2022
Filing Date:
June 25, 2021
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H03H9/145; H03H9/64; H03H9/72
Domestic Patent References:
| WO2019220853A1 | 2019-11-21 | |||
| WO2005107069A1 | 2005-11-10 | |||
| WO2018168439A1 | 2018-09-20 | |||
| WO2016208447A1 | 2016-12-29 |
Foreign References:
| JP2020096291A | 2020-06-18 | |||
| JP2018074562A | 2018-05-10 |
Attorney, Agent or Firm:
YOSHIKAWA, Shuichi et al. (JP)
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