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Title:
ELASTIC WAVE DEVICE, MULTIPLEXER, A HIGH-FREQUENCY FRONT END CIRCUIT, AND COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/138811
Kind Code:
A1
Abstract:
In order to reduce stopband ripple in frequencies above an antiresonance frequency, this elastic wave device (1) includes multiple elastic wave resonators (31-39) disposed between a first terminal (101), which is an antenna terminal, and a second terminal (102), which is different from the first terminal (101). The multiple elastic wave resonators (31-39) include multiple series arm resonators (31, 33, 35, 37, 39) and multiple parallel arm resonators (32, 34, 36, 38). Defining the elastic wave resonator (31) of the multiple elastic wave resonators (31-39) that is electrically nearest the first terminal (101) as the antenna terminal resonator, the antenna terminal resonator is a SAW resonator (3B) or a BAW resonator. At least one elastic wave resonator of the multiple elastic wave resonators (31-39) other than the antenna terminal resonator is a first elastic wave resonator (3A).

Inventors:
NAKAGAWA, Ryo
DAIMON, Katsuya
IWAMOTO, Hideki
TAKAI, Tsutomu
Application Number:
JP2018/046698
Publication Date:
July 18, 2019
Filing Date:
December 19, 2018
Export Citation:
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Assignee:
MURATA MANUFACTURING CO., LTD. (10-1, Higashikotari 1-chome Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
International Classes:
H03H9/64; H03H9/17; H03H9/25; H03H9/54; H03H9/70; H03H9/72
Domestic Patent References:
WO2018003296A12018-01-04
WO2013128636A12013-09-06
Foreign References:
JP2017152881A2017-08-31
JP2013251848A2013-12-12
JP2010021718A2010-01-28
Attorney, Agent or Firm:
HOKUTO PATENT ATTORNEYS OFFICE (Umeda Square Bldg, 12-17 Umeda 1-chome, Kita-ku, Osaka-sh, Osaka 01, 〒5300001, JP)
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