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US 12,267,065 B2Granted
Acoustic wave filter with overtone mode resonators
AssigneeSkyworks Global Pte. Ltd.
InventorsJiansong Liu, Kwang Jae Shin, Alexandre Augusto Shirakawa, Yiliu Wang
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Abstract
Aspects of this disclosure relate to acoustic wave filters with bulk acoustic wave resonators configured to excite an overtone mode as a main mode. A bulk acoustic wave resonator of the filter can include a plurality of stacked piezoelectric layers positioned between a pair of electrodes.
Claims20
An acoustic wave filter with overtone mode bulk acoustic wave resonators, the acoustic wave filter comprising:
- a first bulk acoustic wave resonator including a first plurality of stacked piezoelectric layers positioned between a pair of first electrodes, the first bulk acoustic wave resonator configured to excite an overtone mode as a main mode of the first bulk acoustic wave resonator;
- and
- a second bulk acoustic wave resonator including a second plurality of stacked piezoelectric layers positioned between a pair of second electrodes, the second bulk acoustic wave resonator configured to excite the overtone mode as a main mode of the second bulk acoustic wave resonator, the second bulk acoustic wave resonator coupled to the first bulk acoustic wave resonator, and the acoustic wave filter configured to filter a radio frequency signal.
Dependencies are inferred from the claim text.