Flat plate type phased array device

The invention discloses a flat plate type phased array device, which is used for realizing a multi-beam common-aperture flat plate type phased array device with high integration level and low profile. The device comprises antennas and M/N amplitude-phase control modules connected with the antennas, each amplitude-phase control module is provided with N signal input ends and N signal output ends, and each signal output end is connected with one antenna; the total number of all antennas is M; m is an integral multiple of N; the initial signal processing module is connected with the amplitude-phase control modules and is used for executing the following steps on each path of beam signal in the N paths of beam signals: respectively performing filtering frequency mixing and filtering amplification on the path of beam signal, then passing through a one-division M/N power division network to obtain M/N paths of branch signals, inputting the M/N paths of branch signals into M/N amplitude-phase control modules, inputt