US 12,334,907 B2
Acoustic wave filter with shunt resonator for filter steepness
Tomoya Komatsu, Irvine, CA (US); Yiliu Wang, Irvine, CA (US); and Jinbaek Song, Pleasanton, CA (US)
Assigned to Skyworks Solutions, Inc., Irvine, CA (US)
Filed by Skyworks Solutions, Inc., Irvine, CA (US)
Filed on Sep. 28, 2022, as Appl. No. 17/936,074.
Claims priority of provisional application 63/261,857, filed on Sep. 30, 2021.
Claims priority of provisional application 63/261,863, filed on Sep. 30, 2021.
Prior Publication US 2023/0095556 A1, Mar. 30, 2023
Int. Cl. H03H 9/56 (2006.01); H03H 9/13 (2006.01); H03H 9/205 (2006.01)
CPC H03H 9/568 (2013.01) [H03H 9/13 (2013.01); H03H 9/205 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An acoustic wave filter comprising:
a plurality of series acoustic wave resonators; and
a plurality of shunt acoustic wave resonators including a first bulk acoustic wave resonator and a second bulk acoustic wave resonator,
the plurality of series acoustic wave resonators and the plurality of shunt acoustic wave resonators together arranged as a band pass filter with a pass band,
the first bulk acoustic wave resonator is configured to contribute to forming a lower edge of the pass band,
the second bulk acoustic wave resonator is configured to contribute to forming an upper edge of the pass band, and
the second bulk acoustic wave resonator is smaller than the first bulk acoustic wave resonator.