US 12,476,614 B2
Acoustic wave filter
Chanhee Park, Suwon-si (KR); and Sangheon Han, 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 Dec. 26, 2023, as Appl. No. 18/396,029.
Claims priority of application No. 10-2023-0047622 (KR), filed on Apr. 11, 2023.
Prior Publication US 2024/0348232 A1, Oct. 17, 2024
Int. Cl. H03H 9/56 (2006.01); H03H 9/13 (2006.01); H03H 9/60 (2006.01)
CPC H03H 9/568 (2013.01) [H03H 9/133 (2013.01); H03H 9/605 (2013.01)] 6 Claims
OG exemplary drawing
 
4. An acoustic wave filter, comprising:
a series resonator connected between a first port and a second port;
a first shunt resonator having a first end connected to a first end of the series resonator;
a second shunt resonator having a first end connected to a second end of the series resonator, and a second end connected to a second end of the first shunt resonator at a node; and
a fourth resonator connected between the node and ground,
wherein a resonance frequency of the first shunt resonator is equal to a resonance frequency of the second shunt resonator, and
wherein a band between the resonance frequency of the first shunt resonator and an anti-resonance frequency of the first shunt resonator does not overlap with a band between the resonance frequency of the fourth resonator and an anti-resonance frequency of the fourth resonator.