Front-end module
AssigneeMurata Manufacturing Co., Ltd.
InventorKoichi UENO
Life of this patent
Estimating the term…
Abstract
A front-end module, which uses a carrier aggregation method in which communication is performed by simultaneously using Band 8 and Band 3, includes an antenna switch module that switches connections between an antenna and a plurality of signal paths, a first circuit that is connected to a Band 8 signal path, and a second circuit that is connected to a Band 3 signal path and is electromagnetic-field coupled with the first circuit. A signal including a Band 3 frequency component that propagates from the signal path to the signal path via the antenna switch module and a signal including a Band 3 frequency component that propagates from the signal path to the signal path via the first circuit and the second circuit have a phase-shifted relationship with each other.
Claims20
A front-end module, which uses a carrier aggregation method in which communication is performed by simultaneously using a first frequency band selected from among a plurality of frequency bands and a second frequency band selected from among the plurality of frequency bands and being at a different frequency from the first frequency band, the front-end module comprising:
- a plurality of signal paths that connect a transmission processing circuit, which amplifies transmission waves in advance, or a reception processing circuit, which subjects reception waves to signal processing, and an antenna to each other, and that propagate signals of corresponding frequency bands among the plurality of frequency bands;
- an antenna switch module that switches connections between the antenna and the plurality of signal paths by simultaneously connecting the antenna and at least two signal paths among the plurality of signal paths;
- a first circuit that is connected to a first signal path that propagates signals of the first frequency band;
- and
- a second circuit that is connected to a second signal path that propagates signals of the second frequency band, and is electromagnetic-field coupled with the first circuit;
- wherein
- a signal including a frequency component of the second frequency band that propagates from the first signal path to the second signal path via the antenna switch module, and a signal including a frequency component of the second frequency band that propagates from the first signal path to the second signal path via the first circuit and the second circuit have a phase-shifted relationship with each other.
Dependencies are inferred from the claim text.