Title:
MULTIPLEXER, HIGH-FREQUENCY CIRCUIT, AND COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/004190
Kind Code:
A1
Abstract:
The present invention improves the filter characteristic of a first filter while suppressing degradation of the filter characteristic of a second filter. A multiplexer (1) is provided with a first terminal (101), a second terminal (102), a first filter (2) and a second filter (3), and a capacitive element (5). The first filter (2) and the second filter (3) are connected to an antenna via the first terminal (101). The first filter (2) comprises a plurality of series-arm resonators (21 to 25), a plurality of parallel-arm resonators (26 to 29), and an inductor (4). The inductor (4) is provided between a parallel-arm resonator (26) and the ground. A first end (51) of the capacitive element (5) is connected to a first path (S1) at a position between a series-arm resonator (25) closest to the first terminal (101) and the second terminal (102). A second end (52) of the capacitive element (5) is connected between the parallel-arm resonator (26) and the inductor (4).
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Inventors:
TANI MASAKAZU
Application Number:
PCT/JP2021/019522
Publication Date:
January 06, 2022
Filing Date:
May 24, 2021
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H03H9/64; H03H9/72
Domestic Patent References:
| WO2019107280A1 | 2019-06-06 | |||
| WO2018096799A1 | 2018-05-31 | |||
| WO2016104598A1 | 2016-06-30 |
Attorney, Agent or Firm:
HOKUTO PATENT ATTORNEYS OFFICE (JP)
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