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US 12,744,553 B2Granted
Radio-frequency circuit and communication device
AssigneeMurata Manufacturing Co., Ltd.
InventorKeisuke Arima
Life of this patent
Estimating the term…
Abstract
A radio-frequency circuit includes a common terminal and a common terminal, a filter connected to the common terminal and the common terminal and having a first pass band, a filter connected to the common terminal and the common terminal and having a second pass band, and a cancellation circuit connected to the common terminal and the common terminal, connected in parallel with the filter and the filter, and configured to vary at least one of an amplitude and a phase in the bandpass characteristics.
Claims19
A radio-frequency circuit, comprising:
- a first common terminal and a second common terminal;
- a first bandpass filter connected to the first common terminal and the second common terminal and having a first pass band;
- a second bandpass filter connected to the first common terminal and the second common terminal and having a second pass band;
- a cancellation circuit connected to the first common terminal and the second common terminal, connected in parallel with the first bandpass filter and the second bandpass filter, the cancellation circuit configured to vary at least one of an amplitude and a phase in a bandpass characteristic;
- a first switch disposed between the first common terminal and the first bandpass filter, the second bandpass filter, and the cancellation circuit;
- and
- a second switch disposed between the second common terminal and the first bandpass filter, the second bandpass filter, and the cancellation circuit;
- wherein
- the first common terminal and the second common terminal are configured to connect to the first bandpass filter and the cancellation circuit simultaneously.
6 more elements
A radio-frequency circuit, comprising:
- a first common terminal and a second common terminal;
- a first bandpass filter connected to the first common terminal and the second common terminal and having a first pass band;
- a second bandpass filter connected to the first common terminal and the second common terminal and having a second pass band;
- and
- a cancellation circuit connected to the first common terminal and the second common terminal, connected in parallel with the first bandpass filter and the second bandpass filter, the cancellation circuit configured to vary at least one of an amplitude and a phase in a bandpass characteristic, wherein in the bandpass characteristic of the cancellation circuit, an insertion loss is 10 dB or more over a frequency range from a DC to three times a frequency of a high frequency end of a high frequency side out of a high frequency end of the first pass band and a high frequency end of the second pass band.
2 more elements
Dependencies are inferred from the claim text.