Title:
FILTER DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/138827
Kind Code:
A1
Abstract:
Provided is a filter device that has a wider pass-band and is reduced in size. A filter device 1 of the present invention comprises a plurality of resonators including at least one series-arm resonator and at least one parallel-arm resonator. The plurality of resonators include a parallel-arm resonator P4 as a first resonator having a largest fractional bandwidth value among the plurality of resonators, and at least one second resonator other than the first resonator. The filter device 1 further comprises an inductor L connected in series to the parallel-arm resonator P4 (first resonator).
Inventors:
TANIGUCHI YASUMASA (JP)
Application Number:
PCT/JP2021/047890
Publication Date:
June 30, 2022
Filing Date:
December 23, 2021
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H03H9/145; H03H9/17; H03H9/25; H03H9/54; H03H9/64
Domestic Patent References:
| WO2020009121A1 | 2020-01-09 | |||
| WO2014045726A1 | 2014-03-27 | |||
| WO2019177028A1 | 2019-09-19 | |||
| WO2018216417A1 | 2018-11-29 | |||
| WO2016136413A1 | 2016-09-01 | |||
| WO2019065274A1 | 2019-04-04 |
Foreign References:
| JP2020014104A | 2020-01-23 | |||
| JP2020102814A | 2020-07-02 |
Attorney, Agent or Firm:
MIYAZAKI & METSUGI (JP)
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