On indirect method of RCS calculation of conducting targets in random media

Abstract

One of the random medium effects is the enhancement in radar cross-section (RCS) of targets, and it can be explained by the coherent addition of doubly scattered waves. In several earlier studies (Tateiba, M. and Tomita, E., 1992; El-Ocla, H. and Tateiba, 2001, 2002, 2003), we have proved that the spatial coherence length (SCL) of waves around the target in a random medium, together with the target configuration, affects the RCS and backscattering enhancement, apart from the polarization of the incident waves. This conclusion is important in radar detection and remote sensing applications. These results need a lot of computation time if we use our method directly. We propose an indirect estimate for the RCS by using a beam wave incident on a conducting target in free space. This method presents an approximate solution to the scattering problem in a random medium. This indirect estimate reduces the processing time that is so important in radar detection, especially in real time applications. H-wave scattering is quite different from E-wave scattering, especially in the resonance region, because of waves creeping along objects. Therefore, we need to analyze the scattering for both polarizations. The time factor is assumed and suppressed. This method is applicable for low and high frequency ranges.