Study of Multi-Path Interference Suppression in Outdoor RCS Measurement

To deal with the problem that the radar cross section (RCS) outdoor measurement result is vulnerable to the multi-path interference with low elevation, a radio propagation loss prediction model for outdoor RCS range is presented with the use of ray tracing technique. The direct signal, ground reflection signal and edge diffraction signal were considered in the presented model. The general expression of the path transmission attenuation with single knife edge fence was derived in detail. Numerical simulation and analysis was carried out by taking an outdoor range as an example, and the rule for selecting the key parameters of the radar fence was given. Based on the optimized result, the radar fence has been realized in engineering. Experimental results demonstrate the practicality and effectiveness of the proposed model.