Multiplexer with filter including different types of acoustic wave resonators
AssigneeSkyworks Solutions, Inc.
InventorsYiliu Wang, Nan Wu, Tomoya Komatsu
Life of this patent
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Abstract
Aspects of this disclosure relate to multiplexers with acoustic wave resonators. The multiplexer includes a first filter and a second filter. The first filter includes a plurality of bulk acoustic wave resonators and a shunt surface acoustic wave resonator. The shunt acoustic wave resonator can have a resonant frequency in a passband of the second filter. The passband of the second filter is below a passband of the first filter. In certain applications, the first filter is a receive filter and the second filter is a transmit filter.
Claims21
(canceled)
A multiplexer with acoustic wave resonators, the multiplexer comprising:
- a first filter including a first plurality of bulk acoustic wave resonators and a shunt surface acoustic wave resonator;
- and
- a transmit filter coupled to the first filter, the transmit filter including a second plurality of bulk acoustic wave resonators, the transmit filter being a band pass filter having a transmit passband, and the shunt surface acoustic wave resonator having a resonant frequency that is within the transmit passband.
A packaged module with a multiplexer on a plurality of dies, the packaged module comprising:
- a first die including bulk acoustic wave resonators of a first filter of the multiplexer, the bulk acoustic wave resonators including series bulk acoustic wave resonators and shunt bulk acoustic wave resonators;
- and
- a second die including a shunt surface acoustic wave resonator of the first filter of the multiplexer and surface acoustic wave resonators of a second filter of the multiplexer, the surface acoustic wave resonators of the second filter including series surface acoustic wave resonators and shunt surface acoustic wave resonators.
A wireless communication device comprising:
- a multiplexer that includes a first filter and a transmit filter, the first filter including a first plurality of bulk acoustic wave resonators and a shunt surface acoustic wave resonator, the transmit filter including a second plurality of bulk acoustic wave resonators, the transmit filter being a band pass filter having a transmit passband, and the shunt surface acoustic wave resonator having a resonant frequency that is within the transmit passband;
- an antenna operatively coupled to the multiplexer;
- a radio frequency amplifier operatively coupled to the multiplexer 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.