EM Analysis of Geometrical Uncertainty for Metallic/Dielectric Bodies of Revolution Targets

Abstract

An efficient EM scattering solution of geometrical uncertainty is fabricated to analyze the scattering from electrically large metallic/dielectric bodies of revolution (BoRs). The algorithm started by describing the geometrical shape of the BoR with the two-dimensional non-uniform rational B-spline curves. Then the relationship can be constructed between the local random variables and the spatial BoR basis functions. Thus, the surface integral equations were represented in terms of independent random variables. Radar cross section can be quickly obtained for perturbed geometrical shapes and the proposed algorithm can save computational resources when compared with theMonte Carlo (MC) method. The electrical field integral equation (EFIE) is applied to calculate the metallic BoR targets, whereas the Poggio–Miller–Chang–Harrington–Wu–Tsai (PMCHWT) integral equation is used to analyze the dielectric BoR targets. Numerical results are given to demonstrate the accuracy and efficiency of the proposed method.