SIP-based broadband preselection module and processing method

The invention discloses an SIP (Session Initiation Protocol)-based broadband preselection module and a processing method. The broadband preselection module comprises a bottom layer circuit (11) and an upper layer circuit (12), the device further comprises a first channel and a second channel. Wherein the first channel and the second channel are the same in structure, an amplitude limiter (13), a first switch (14), a high-frequency amplifier (15), a straight-through circuit (16), a low-frequency amplifier (17) and a second switch (18) are arranged in a channel of the bottom layer circuit (11), and a numerical control attenuator (19), a switch filter (20) and an amplifier (21) are arranged in a channel of the upper layer circuit (12). According to the SIP-based broadband preselection module, the size and the weight are compressed to one third of the original size and weight under the condition that performance indexes are not changed, the high-power interference signal burning resistance, the dynamic range, the