Department of Electrical and Computer Engineering, Isfahan University of Technology (IUT), Isfahan, Iran
The Radar Cross Section of a target plays an important role in the detection of targets by radars. This paper presents a new method to predict the bistatic and monostatic RCS of coated electrically large objects. The bodies can be covered by lossy electric and/or magnetic Radar Absorbing Materials (RAMs). These materials can be approximated by the Fresnel reflection coefficients. The proposed method uses modified Physical Optics (PO) approximation to obtain the object scattered field. One of the advantages is the use of Stationary Phase Method (SPM) to solve the PO integral. This is becausethe SPM reduces significantly the computation time required to solve this integral as compared to rigorously numerical integration techniques. Simulationresults are presented to verify the accuracy and efficiency of the proposed method. The results are compared with commercial FEKO and CST software in order to show its superiority as far as the computation time is concerned.