Iterative Physical Optics Method for Electromagnetic Analysis of radomes based on the well-conditioned N-cross Muller formulation

An improved iterative physical optics (IPO) scheme based on the well-conditioned N-Muller formulation is proposed to analyze the RF performance of a dielectric radomes. It is shown that the use of the N-Muller formulation in combination with the Rao-Wilton-Glisson basic functions leads to a well-conditioned matrix equation and rapidly converging iterative solutions. The main advantage of the proposed IPO method is that it excludes hypersingular and strongly singular terms from the integral equations of the electric and magnetic fields, leaving only weakly singular terms that can be easily treated by the singularity extraction method. The proposed IPO scheme was used to analyze the antenna pattern in the presence of an arbitrary dielectric radome. The results obtained were compared with the results obtained from the CST Integral Equation Solver software and good agreement is observed.