Abstract:

A fullpolarization synthetic aperture radar (SAR) hardinloop system is constructed in an anechoic chamber. The operation track of SAR is simulated by lateral movement of a scanner. As the core hardware of system, a vector network analyzer is set in the scanner and moved together. Two measured channels are connected with four vertical or horizontal antennas by the expand ports. Then the fullpolarization scattering matrixes are gotten with the scanner moving. For processing the steppedfrequency signals in the system, an improved backprojection algorithm is adopted, and four different polarization images are gained. The experiments are carried out on Lband and Cband respectively. The resolution of images after processing is more than 0.2 m, and the images are coincident with the physical characteristic of scene. The results show that the system is feasible to engineering.