Acoustic filter and electronic device
AssigneeHuawei Technologies Co., Ltd.
InventorsYulin Huang, Benfeng Zhang, Xinyi Li, Rongrong Che, Zongzhi Gao
Life of this patent
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Abstract
An acoustic filter includes a first resonator, a second resonator, and a first acoustic wave suppression structure. The first resonator and the second resonator are arranged in a first direction. The first acoustic wave suppression structure is disposed between the first resonator and the second resonator, and at least one stopband generated by the first acoustic wave suppression structure is used to reduce an acoustic wave that is leaked between the first resonator and the second resonator and that is propagated in the first direction.
Claims20
An acoustic filter comprising:
- a first resonator arranged in a first direction;
- a second resonator arranged in the first direction;
- and
- a first acoustic wave suppression structure disposed between the first resonator and the second resonator and configured to generate at least one first stopband to reduce a first acoustic wave that is leaked between the first resonator and the second resonator and that is propagated in the first direction, wherein the first acoustic wave suppression structure has a first length in a second direction, wherein the first resonator has a second length in the second direction, wherein the second resonator has a third length in the second direction, wherein the first length is greater than the second length and/or the third length, and wherein the first direction is perpendicular to the second direction.
An electronic device, comprising:
- a printed circuit board;
- and
- an acoustic filter disposed on the printed circuit board and comprising:
- a first resonator arranged in a first direction;
- a second resonator arranged in the first direction;
- and
- an acoustic wave suppression structure disposed between the first resonator and the second resonator and configured to generate at least one stopband to reduce an acoustic wave that is leaked between the first resonator and the second resonator and that is propagated in the first direction, wherein the acoustic wave suppression structure has a first length in a second direction, wherein the first resonator has a second length in the second direction, wherein the second resonator has a third length in the second direction, wherein the first length is greater than the second length and/or the third length, and wherein the first direction is perpendicular to the second direction.
Dependencies are inferred from the claim text.