Parallel acoustic wave filters
AssigneeSkyworks Solutions, Inc.
InventorSatoru Ikeuchi
Life of this patent
Estimating the term…
Abstract
Aspects of this disclosure relate to an acoustic wave filter with parallel band pass filters. Each band pass filter can be an acoustic wave filter having a passband. One of the parallel band pass filters can have higher passband frequencies than another of the parallel band pass filters. The passbands of the parallel band pass filters can overlap in an overlap band. One of the parallel band pass filters can have a higher impedance in the overlap band than another of the parallel band pass filters.
Claims20
A band pass filter with parallel acoustic wave filters, the band pass filter comprising:
- a first acoustic wave filter having a first passband;
- and
- a second acoustic wave filter having a second passband, the second acoustic wave filter being in parallel with the first acoustic wave filter, the second passband including frequencies above the first passband, the first passband and the second passband overlapping in an overlap band from a lower cutoff frequency of the second passband to an upper cutoff frequency of the first passband, the upper cutoff frequency of the first passband being at a higher frequency than the lower cutoff frequency of the second passband, the first acoustic wave filter having a higher impedance in the overlap band than the second acoustic wave filter.
A radio frequency module comprising:
- a first acoustic wave filter having a first passband;
- a second acoustic wave filter having a second passband, the second acoustic wave filter being in parallel with the first acoustic wave filter, the second passband including frequencies above the first passband, the first passband and the second passband overlapping in an overlap band from a lower cutoff frequency of the second passband to an upper cutoff frequency of the first passband, the upper cutoff frequency of the first passband being at a higher frequency than the lower cutoff frequency of the second passband, the first acoustic wave filter having a higher impedance in the overlap band than the second acoustic wave filter;
- and
- radio frequency circuitry coupled to the first and second acoustic wave filters, the first and second acoustic wave filters and the radio frequency circuitry being enclosed within a common package.
A wireless communication device comprising:
- an acoustic wave filter including a first acoustic wave filter having a first passband and a second acoustic wave filter having a second passband, the second acoustic wave filter being in parallel with the first acoustic wave filter, the second passband including frequencies above the first passband, the first passband and the second passband overlapping in an overlap band from a lower cutoff frequency of the second passband to an upper cutoff frequency of the first passband, the upper cutoff frequency of the first passband being at a higher frequency than the lower cutoff frequency of the second passband, the first acoustic wave filter having a higher impedance in the overlap band than the second acoustic wave filter;
- an antenna operatively coupled to the acoustic wave filter;
- a radio frequency amplifier operatively coupled to the acoustic wave filter and configured to amplify a radio frequency signal;
- and
- a transceiver in communication with the radio frequency amplifier.
Dependencies are inferred from the claim text.