Design and Research of near-Field and High-Dynamic Millimeter-Wave SAR Imaging System

Millimeter-wave technology is widely used in many fields. Due to its short wavelength and strong penetration, millimeter-wave technology has been rapidly developed in the field of radar imaging. This paper designs a millimeter-wave radar system for two-dimensional high-resolution imaging of scattering points in the near-field range. A millimeter-wave SAR imaging system was designed, and the applicability of the modified back-projection algorithm was verified through system simulation. The darkroom test result shows that the imaging system can synthesize a short aperture using the uniform linear motion of the platform, and perform high-resolution two-dimensional imaging of the scattering points in the near-field range. The imaging effect is good.