Title:
ELASTIC WAVE FILTER APPARATUS AND MULTIPLEXER
Document Type and Number:
WIPO Patent Application WO/2018/088153
Kind Code:
A1
Abstract:
A reception filter (20) is provided with: a parallel arm resonator (p1); a longitudinal coupling resonator (d1) that has a plurality of first elastic wave resonators; and a longitudinal coupling resonator (d2) that is connected to the longitudinal coupling resonator (d1) and that has a plurality of second elastic wave resonators. Each of the first elastic wave resonators and each of the second elastic wave resonators are connected at one end to a ground. The parallel arm resonator (p1), the longitudinal coupling resonator (d1), and the longitudinal coupling resonator (d2) are formed on a piezoelectric substrate (100). A ground to which the parallel arm resonator (p1) is connected, a ground to which at least one of the first elastic wave resonators is connected, and a ground to which at least one of the second elastic wave resonators is connected are connected together on the piezoelectric substrate (100).
Inventors:
TAGUCHI TOMOKO (JP)
NAKAMURA SHINICHI (JP)
NAKAMURA SHINICHI (JP)
Application Number:
PCT/JP2017/037745
Publication Date:
May 17, 2018
Filing Date:
October 18, 2017
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H03H9/64; H03H9/72
Domestic Patent References:
| WO2010052969A1 | 2010-05-14 | |||
| WO2015040921A1 | 2015-03-26 |
Foreign References:
| JP2000349591A | 2000-12-15 |
Attorney, Agent or Firm:
YOSHIKAWA, Shuichi et al. (JP)
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