Design and determination for the front fed Cassegrain compact range

In theory, simulation and experiment, it was proved that the cross-polarization is eliminated in geometric-optics condition when the geometries ofthe front fed Cassegrain compact range satisfy the Mizugutch condition. The optimization rule on the layout and serration of the compact range was referred to, then the optimization algorithm was performed and the result was given. The front fed Cassegrain compact range (the mode K2010) was developed. The amplitude character, phase character and cross-polarization character of the quiet zone were determined in X band, Ku band and Ka band, which was compared to the calculation results with the PO(physical optics) method. The performance of K2010 was analyzed from the simulation and experimental results. Compared to other types of compact range, the front fed Cassegrain compact range provides larger quiet zone and lower polarization, which satisfies the requirement to the polarization purity in the satellite test and polarization matrix measurement.