Title:
COMPOSITE FILTER, MULTIPLEXER, AND COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/234405
Kind Code:
A1
Abstract:
In this composite filter, an LC filter has one or more attenuation poles on the lower frequency side of a pass band. At least one of a plurality of acoustic wave resonators has an anti-resonance frequency located between one of the one or more attenuation poles that is closest to the pass band and the pass band. The plurality of acoustic wave resonators are connected in series to each other, and constitute a part of a signal path. At least one of the plurality of acoustic wave resonators has a plurality of divided resonators. The plurality of divided resonators are connected to each other by a parallel connection and/or a series connection to a reference potential portion without passing through a node. At least one of the plurality of acoustic wave resonators has two divided resonators having mutually different anti-resonance frequencies.
Inventors:
OKUMICHI TAKEHIRO (JP)
Application Number:
PCT/JP2023/020566
Publication Date:
December 07, 2023
Filing Date:
June 02, 2023
Export Citation:
Assignee:
KYOCERA CORP (JP)
International Classes:
H03H9/64; H03H7/46; H03H9/145; H03H9/17; H03H9/54; H04B1/40
Domestic Patent References:
| WO2021002321A1 | 2021-01-07 | |||
| WO2016088680A1 | 2016-06-09 | |||
| WO2005027535A2 | 2005-03-24 |
Foreign References:
| JP2021190908A | 2021-12-13 |
Attorney, Agent or Firm:
IIJIMA, YASUHIRO (JP)
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