Bulk acoustic wave resonator having multiple resonant frequencies
AssigneeSkyworks Solutions, Inc.
InventorsYiliu Wang, Jiansong Liu, Tomoya Komatsu
Life of this patent
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Abstract
Aspects of this disclosure relate to an acoustic wave filter that includes a shunt a bulk acoustic wave resonator having a plurality of resonant frequencies that impact a passband of the acoustic wave filter. Related bulk acoustic wave resonators, radio frequency modules, wireless communication devices, and methods of filtering radio frequency signals are disclosed.
Claims20
An acoustic wave filter configured to filter a radio frequency signal and having a passband, the acoustic wave filter comprising:
- a bulk acoustic wave resonator having at least a first resonant frequency corresponding to a first region and a second resonant frequency corresponding to a second region, the bulk acoustic wave resonator having a first peak conductance at the first resonant frequency and a second peak conductance at the second resonant frequency, and the first resonant frequency and the second resonant frequency both impacting the passband;
- and
- a plurality of additional acoustic wave resonators, the plurality of additional acoustic wave resonators and the bulk acoustic wave resonator together configured to filter the radio frequency signal.
An acoustic wave filter configured to filter a radio frequency signal and having a passband, the acoustic wave filter comprising:
- a bulk acoustic wave resonator including a first region associated with a first resonant frequency, a second region associated with a second resonant frequency that is distinct from the first resonant frequency, and a third region around the first region and the second region, the bulk acoustic wave resonator including a raised frame structure in the third region, and the first resonant frequency and the second resonant frequency both impacting the passband;
- and
- a plurality of additional acoustic wave resonators, the plurality of additional acoustic wave resonators and the bulk acoustic wave resonator together configured to filter the radio frequency signal.
A wireless communication device comprising:
- an acoustic wave filter having a passband and configured to filter a radio frequency signal, the acoustic wave filter including a bulk acoustic wave resonator having at least a first resonant frequency corresponding to a first region and a second resonant frequency corresponding to a second region, the bulk acoustic wave resonator having a first peak conductance at the first resonant frequency and a second peak conductance at the second resonant frequency, and the first resonant frequency and the second resonant frequency both impacting the passband;
- an antenna operatively coupled to the acoustic wave filter;
- a radio frequency amplifier operatively coupled to the acoustic wave filter;
- and
- a transceiver in communication with the radio frequency amplifier.
Dependencies are inferred from the claim text.