US 12,155,370 B2
Acoustic wave device, module having the same
Hiroomi Kaneko, Tokyo (JP)
Assigned to Sanan Japan Technology Corporation, Tokyo (JP)
Filed by Sanan Japan Technology Corporation, Tokyo (JP)
Filed on Jun. 15, 2021, as Appl. No. 17/348,658.
Claims priority of application No. 2021-035048 (JP), filed on Mar. 5, 2021.
Prior Publication US 2022/0286110 A1, Sep. 8, 2022
Int. Cl. H03H 9/54 (2006.01); H03H 9/13 (2006.01)
CPC H03H 9/54 (2013.01) [H03H 9/13 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An acoustic wave device, comprising:
a substrate;
a transmission filter formed on the substrate;
a reception filter formed on the substrate;
a transmission ground pad of the transmission filter, the transmission ground pad is formed on the substrate; and
a reception ground pad of the reception filter, the reception ground pad is formed on the substrate, wherein
the transmission filter includes a plurality of series resonators and a plurality of parallel resonators,
the plurality of parallel resonators includes a first parallel resonator electrically connected to the reception ground pad,
the plurality of parallel resonators includes a second parallel resonator electrically connected to the transmission ground pad, and
the first parallel resonator and the second parallel resonator are resonators divided in a final stage of the transmission filter, the final stage is disposed at a position farthest from an input terminal of the transmission filter among the plurality of parallel resonators.