Title:
MULTIPLEXER, HIGH-FREQUENCY FRONT-END CIRCUIT, AND COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/065670
Kind Code:
A1
Abstract:
According to the present invention, a first filter (11) of a multiplexer (1) has a ladder filter structure that is configured from a plurality of elastic wave resonators (110). Imaginary lines (L1) obtained by connecting other ends (e2) of a plurality of electrode fingers (322a) of one comb-like electrode (32a) of a pair of comb-like electrodes (32a, 32b) of the resonators (110) intersect a reference line (L0) that is a straight line that runs along an elastic wave propagation direction (D1). When the angle formed between the reference line (L0) and the imaginary line (L1) for a first series resonator (111s) is a first angle of inclination (α1), the angle formed between the reference line (L0) and the imaginary line (L1) for a parallel resonator (111p) is a second angle of inclination (α2), and the angle formed between the reference line (L0) and the imaginary lines (L1) for elastic wave resonators (112s–114s, 113p, 114p) is a third angle of inclination (α3), the first angle of inclination (α1) and/or the second angle of inclination (α2) is/are smaller than the third angle of inclination (α3).
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Inventors:
DAIMON KATSUYA (JP)
Application Number:
PCT/JP2018/035557
Publication Date:
April 04, 2019
Filing Date:
September 26, 2018
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H03H9/72; H03H9/145
Domestic Patent References:
| WO2015064238A1 | 2015-05-07 | |||
| WO2016208236A1 | 2016-12-29 | |||
| WO2015098756A1 | 2015-07-02 | |||
| WO2016208677A1 | 2016-12-29 | |||
| WO2016208446A1 | 2016-12-29 | |||
| WO2018003273A1 | 2018-01-04 |
Foreign References:
| JP2013223025A | 2013-10-28 | |||
| JP2017152881A | 2017-08-31 | |||
| JP2016119569A | 2016-06-30 |
Attorney, Agent or Firm:
YOSHIKAWA, Shuichi et al. (JP)
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