Multiplexer including filter with two types of acoustic wave resonators
AssigneeSkyworks Solutions, Inc.
InventorsYoshiaki Ando, Yasuyuki Saito, Hiroyuki Nakamura
Life of this patent
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Abstract
Multiplexers are disclosed. A multiplexer can include a first filter and a second filter that are coupled to a common node. The second filter can include a first type of acoustic wave resonators (e.g., bulk acoustic wave resonators) and a series acoustic wave resonator of a second type (e.g., a surface acoustic wave resonator) that is coupled between the acoustic wave resonators of the first type and the common node. The first filter can provide a single-ended radio frequency signal. In certain embodiments, the first filter can be a receive filter and the second filter can be a transmit filter.
Claims20
A filter assembly comprising:
- a first filter coupled to a first common node, the first filter configured to provide a single-ended radio frequency output signal;
- and
- a second filter coupled to the first common node and configured to filter a radio frequency signal, the second filter including acoustic wave resonators of a first type and a series acoustic wave resonator of a second type coupled between the acoustic wave resonators of the first type and the first common node, the series acoustic wave resonator of the second type having a higher suppression of a second harmonic of a radio frequency signal than the acoustic wave resonators of the first type.
Dependencies are inferred from the claim text.