Acoustic wave resonator with transverse spurious mode for filter steepness
AssigneeSkyworks Solutions, Inc.
InventorsTomoya Komatsu, Yiliu Wang, Akira Ochiai, Joshua James Caron
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Abstract
Aspects of this disclosure relate to an acoustic wave filter with an acoustic wave resonator arranged to concentrate a transverse spurious mode at a frequency. Such an acoustic wave resonator can have a narrow aperture to concentrate the transverse spurious mode. The transverse spurious mode can increase steepness of a skirt of the acoustic wave filter. Related methods, acoustic wave devices, multiplexers, radio frequency front ends, radio frequency modules, and wireless communication devices are disclosed.
Claims20
An acoustic wave filter with a transverse spurious mode for increasing filter skirt steepness, the acoustic wave filter comprising:
- a plurality of series acoustic wave resonators including a first series acoustic wave resonator, the first series acoustic wave resonator configured to concentrate a transverse spurious mode at a frequency;
- and
- a plurality of shunt acoustic wave resonators, the plurality of series acoustic wave resonators and the plurality of shunt acoustic wave resonators together arranged to filter a radio frequency signal, and the transverse spurious mode of the first series acoustic wave resonator configured to increase steepness of a skirt of the acoustic wave filter.
An acoustic wave filter with a transverse spurious mode for increasing skirt steepness, the acoustic wave filter comprising:
- a plurality of shunt acoustic wave resonators including a first shunt acoustic wave resonator, the first shunt acoustic wave resonator configured to concentrate a transverse spurious mode at a frequency;
- and
- a plurality of series acoustic wave resonators, the plurality of shunt acoustic wave resonators and the plurality of series acoustic wave resonators together arranged to filter a radio frequency signal, and the transverse spurious mode of the first shunt acoustic wave resonator configured to increase skirt steepness of the acoustic wave filter.
An acoustic wave filter with a transverse spurious mode for increasing skirt steepness, the acoustic wave filter comprising a plurality of acoustic wave resonators configured to filter a radio frequency signal, the plurality of acoustic wave resonators including a first acoustic wave resonator that includes an interdigital transducer electrode and configured to generate an acoustic wave having a wavelength of λ, the interdigital transducer electrode having an aperture of less than 10λ to concentrate a transverse spurious mode at a frequency, and the transverse spurious mode of the first acoustic wave resonator configured to increase steepness of a skirt of the acoustic wave filter.
Dependencies are inferred from the claim text.