US 12,431,867 B2
Acoustic wave filter
Jungwoo Sung, Suwon-si (KR)
Assigned to Samsung Electro-Mechanics Co., Ltd., Suwon-si (KR)
Filed by SAMSUNG ELECTRO-MECHANICS CO., LTD., Suwon-si (KR)
Filed on May 23, 2023, as Appl. No. 18/322,233.
Claims priority of application No. 10-2022-0170881 (KR), filed on Dec. 8, 2022.
Prior Publication US 2024/0195388 A1, Jun. 13, 2024
Int. Cl. H03H 9/60 (2006.01); H03H 9/00 (2006.01); H03H 9/02 (2006.01)
CPC H03H 9/605 (2013.01) [H03H 9/0014 (2013.01); H03H 9/02015 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An acoustic wave filter comprising:
a first ladder filter, connected between a first port and a second port, comprising a first series resonator and a first shunt resonator;
a first filter, connected between the first port and a first terminal of the first ladder filter, comprising a first inductor and a first capacitor connected in series to each other; and
a second filter, connected between a second terminal of the first ladder filter and the second port, comprising a second inductor and a second capacitor connected in series to each other,
wherein the first inductor and the second inductor have mutual inductance with each other.