Back to results
US 11,114,999 B2Granted
Filter including acoustic wave resonator
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsSung Tae Kim, Jung Woo Sung
Life of this patent
Estimating the term…
Abstract
A filter includes: series resonators disposed between an input terminal and an output terminal; and shunt resonators disposed at different nodes between the input terminal and the output terminal, wherein a resonance frequency and an antiresonance frequency of at least one series resonator among the series resonators are respectively located within a reference frequency range of a resonance frequency and an antiresonance frequency of the shunt resonators.
Claims16
A filter, comprising:
- series resonators disposed between an input terminal and an output terminal;
- and
- shunt resonators disposed at different nodes between the input terminal and the output terminal,
- wherein:
- a resonance frequency difference between at least one series resonator among the series resonators and each of the shunt resonators is narrower than an antiresonance frequency difference between the at least one series resonator and each of other series resonators among the series resonators;
- or
- the resonance frequency difference between the at least one series resonator and each of the shunt resonators is narrower than a resonance frequency difference between the at least one series resonator and each of the other series resonators, and wherein an antiresonance frequency of the at least one series resonator is higher than an upper limit frequency of the filter.
4 more elements
A filter, comprising:
- series resonators disposed between an input terminal and an output terminal;
- and
- shunt resonators disposed at different nodes between the input terminal and the output terminal,
- wherein:
- an antiresonance frequency difference between at least one shunt resonator among the shunt resonators and each of the series resonators is narrower than a resonance frequency difference between the at least one shunt resonator and each of other shunt resonators among the shunt resonators;
- or
- the antiresonance frequency difference between the at least one shunt resonator and each of the series resonators is narrower than an antiresonance frequency difference between the at least one shunt resonator and each of the other shunt resonators, and wherein a resonance frequency of the at least one shunt resonator is below a lower limit frequency of the filter, and
- wherein the lower limit frequency of the filter is located between a resonance frequency and an antiresonance frequency of another shunt resonator among the shunt resonators, and an upper limit frequency of the filter is located between a resonance frequency and an antiresonance frequency of the series resonators.
5 more elements
A filter, comprising:
- series resonators disposed between an input terminal and an output terminal;
- and
- shunt resonators disposed at different nodes between the input terminal and the output terminal,
- wherein:
- an antiresonance frequency difference between at least one shunt resonator among the shunt resonators and each of the series resonators is narrower than a resonance frequency difference between the at least one shunt resonator and each of other shunt resonators among the shunt resonators;
- or
- the antiresonance frequency difference between the at least one shunt resonator and each of the series resonators is narrower than an antiresonance frequency difference between the at least one shunt resonator and each of the other shunt resonators, and
- wherein a resonance frequency of the at least one shunt resonator is below a lower limit frequency of the filter, and
- wherein a difference between a resonance frequency of the series resonators and an antiresonance frequency of the series resonators is equal to a difference between the resonance frequency of the at least one shunt resonator and an antiresonance frequency of the at least one shunt resonator.
6 more elements
Dependencies are inferred from the claim text.