Broadband radar space target characteristic signal simulator

The invention discloses a broadband radar space target characteristic signal simulator which is used for solving the technical problem that the target simulation range of an existing radar signal simulator is narrow. According to the technical scheme, target characteristic calculation is performed, a frequency synthesizer is controlled by a control module according to the center frequency of radar signals, and the radar radio frequency signals are converted to intermediate frequency in work of a high speed AD through a down converter; the acquired radar intermediate frequency signals are converted into a data stream by the high speed AD, and a high-resolution one-dimensional distance image and a high-resolution two-dimensional image can be modulated and simulated in a target characteristic modulation module. Because the target characteristic calculation, the control module and the target characteristic modulation module are used, the application range of the broadband radar signals is widened to 2-18GHz from 8-12GHz in the background technology; the signal simulator can adapt to linear frequency modulated signals, nonlinear frequency modulated signals and stepping frequency modulated and frequency coded signals and further can generate radar echoes for simulating the scattering characteristics and the motion characteristics of a target of a space target satellite.