Title:
ELASTIC WAVE DEVICE, FILTER, AND MULTIPLEXER
Document Type and Number:
Japanese Patent JP2019121873
Kind Code:
A
Abstract:
To improve electric power proofness.SOLUTION: An elastic wave device comprises: a piezoelectric substrate; one or a plurality of IDTs that are provided onto the piezoelectric substrate, include a pair of comb-shaped electrodes having a plurality of electrode fingers, and are serially connected to between a first node and a second node; and one or a plurality of reflectors that are provided in an arrangement direction of the plurality of electrode fingers of one or the plurality of IDTs on the piezoelectric substrate, include a plurality of grating electrodes arranged in the arrangement direction and a pair of bus bars to which at least one of the plurality of grating electrodes is connected, and are serially connected to between the first node and a third node. In at least one reflector of one or the plurality of reflectors, a first grating electrode nearest to one or the plurality of IDTs from the plurality of grating electrodes, comprises: an acoustic wave resonator which is not connected to the bus bar on the third node side of the pair of bus bars; and a capacitor whose one end is connected to the third node, and which is electrically connected to the first node through at least a part of the plurality of grating electrodes.SELECTED DRAWING: Figure 3
Inventors:
NUMATA TOSHIMASA
EBIHARA HITOSHI
KOBAYASHI NAOTO
EBIHARA HITOSHI
KOBAYASHI NAOTO
Application Number:
JP2017254545A
Publication Date:
July 22, 2019
Filing Date:
December 28, 2017
Export Citation:
Assignee:
TAIYO YUDEN KK
International Classes:
H03H9/145; H03H9/64
Attorney, Agent or Firm:
Shuhei Katayama