Radio frequency front-end circuit, filtering method thereof and electronic equipment

Abstract

The invention discloses a radio frequency front-end circuit and a filtering method thereof, and electronic equipment, the radio frequency front-end circuit comprises a first radio frequency path and a second radio frequency path, the first radio frequency path is used for transmitting a first signal, the second radio frequency path is used for transmitting a second signal, and the first signal and the second signal correspond to different frequency bands. Each radio frequency path comprises an input port and an output port; the filters are arranged between the input port and the output port, the cut-off frequencies of the N filters are different, and N is an integer greater than 1; and the gating unit is used for gating at least one of the N filters to be serially connected between the input port and the output port so as to form a filtering path, and the filtering path is used for reducing interference of signals transmitted by non-radio frequency paths where the filtering path is located on signals transmitted by the radio frequency paths where the filtering path is located. The circuit can effectively suppress out-of-band noise, and alleviate the problem of mutual interference of different signals in similar frequency bands or in the frequency bands.

Description

technical field [0001] The invention relates to the technical field of communications, and in particular, to a radio frequency front-end circuit, a filtering method thereof, and an electronic device. Background technique [0002] In the field of communication technology, for frequency bands with overlapping or similar frequency spectrums, the mutual interference caused by communication is a pain point in the industry. Aside from the soft measures such as power reduction and time division, the current hard way is to increase the sideband suppression capability of the filter. However, since the ideal filter does not exist, the actual improvement space of the filter's sideband suppression capability is very limited, which makes it impossible to improve the filter's actual sideband suppression capability. Good solution to the signal interference problem. SUMMARY OF THE INVENTION [0003] The present invention aims to solve one of the technical problems in the related art at l...

AI Technical Summary

Problems solved by technology

For this reason, the first purpose of the present invention is to propose a radio frequency front-end circuit, by gating filters with different cut-off frequencies to form corresponding filtering paths according to different suppression requirements for noise at different frequency points, which strengthens the specific frequency point The noise suppression ability of a single filter overcomes the problem that the noise suppression ability of a single filter is weak to similar frequency bands and cannot suppress noise in the frequency band. Technical Effects of Interference Problems

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