US 12,278,612 B2
Cascaded resonator having reflector electrodes with different pitches
Xiao Zhang, Irvine, CA (US); Tomoya Komatsu, Irvine, CA (US); and Yiliu Wang, Irvine, CA (US)
Assigned to SKYWORKS SOLUTIONS, INC., Irvine, CA (US)
Filed by SKYWORKS SOLUTIONS, INC., Irvine, CA (US)
Filed on Jan. 22, 2024, as Appl. No. 18/419,025.
Application 18/419,025 is a continuation of application No. 17/093,761, filed on Nov. 10, 2020, granted, now 11,881,836.
Claims priority of provisional application 62/940,075, filed on Nov. 25, 2019.
Prior Publication US 2024/0162880 A1, May 16, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H03H 9/02 (2006.01); H03H 9/00 (2006.01); H03H 9/145 (2006.01); H03H 9/25 (2006.01); H03H 9/64 (2006.01); H03H 9/72 (2006.01); H04B 1/38 (2015.01)
CPC H03H 9/02685 (2013.01) [H03H 9/0009 (2013.01); H03H 9/145 (2013.01); H03H 9/25 (2013.01); H03H 9/6483 (2013.01); H03H 9/6496 (2013.01); H03H 9/725 (2013.01); H04B 1/38 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An acoustic wave device comprising:
a piezoelectric substrate;
interdigital transducer electrodes having an electrode pitch λ0;
first and second reflector gratings disposed on opposite respective sides of the interdigital transducer electrodes in a propagation direction of a main acoustic wave through the acoustic wave device, the first reflector grating having a reflector electrode pitch λ1 throughout an entirety of the first reflector grating that is different than a reflector electrode pitch λ2 throughout an entirety of the second reflector grating to suppress ripples in a conductance curve of the acoustic wave device, each of λ1 and λ2 being greater than λ0 by between about 2% and about 5%.