Acoustic wave filter
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorChanhee PARK
Life of this patent
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Abstract
An acoustic wave filter includes: a plurality of first series resonators connected in series between a first port and a second port; a plurality of shunt resonators, each shunt resonators being connected between a different node disposed between the first port and the second port and the ground; at least one second series resonator connected in parallel to at least one of the first series resonators; and an inductor connected between one of the shunt resonators and the ground. A resonant frequency of the shunt resonator connected to the inductor is the same as a resonant frequency of at least one of the plurality of first series resonators.
Claims10
An acoustic wave filter comprising:
- a plurality of first series resonators connected in series between a first port and a second port;
- a plurality of shunt resonators, each shunt resonators being connected between a different node disposed between the first port and the second port and the ground;
- at least one second series resonator connected in parallel to at least one of the first series resonators;
- and
- an inductor connected between one of the shunt resonators and the ground,
- wherein a resonant frequency of the shunt resonator connected to the inductor is the same as a resonant frequency of at least one of the plurality of first series resonators.
An acoustic wave filter comprising:
- a second series resonator connected in parallel to one of a plurality of first series resonators connected in series between a first port and a second port;
- and
- an inductor connected between the ground and a first shunt resonator among a plurality of shunt resonators connected between a plurality of nodes between the first port and the second port and the ground,
- wherein a resonant frequency of the second series resonator is the same as a resonant frequency of at least one of the shunt resonators except for the first shunt resonator.
Dependencies are inferred from the claim text.