IPO for Analysis of EM Scattering by Dielectric Coated Electrically Large Cavities
He Xiao-xiang①; Xu Jin-ping②; Gu Chang-qing①
①College of Information Science and Technology Nanjing University of Aeronauticsand Astronautics Nanjing 210016 China;②State Key Lab of Millimeter Waves Southeast University Nanjing 210096 China
Abstract：A theoretical model of Iterative Physical Optics (IPO) is established for the ElectroMagnetic (EM) scattering problem with imperfectly conducting boundaiy and applied to the analysis of EM scattering by a dielectric coated electrically large cavity. In each IPO iteration step, the total field on the dielectric surface is computed utilizing the Fresnel reflection coefficient. By employing iteration process, the EM field distribution on the inner wall of the cavity is predicted and then the scattering fields of the cavity are obtained. Numerical results demonstrate that the improved IPO algorithm is correct and effective for the analysis of dielectric coated electrically large targets.
2005, Vol. 27 
