An improved TDS-PO with the closed-form formulation of integrals for EM scattering problems

To further improve the efficiency of the iterative hybridization of thin dielectric sheet (TDS) approximation and physical optics (PO), the closed-form formulations of integrals involved in the calculation of disturbance to TDS zone caused by the PO zone are discussed. Numerical experiments for an electromagnetic scattering problem present the capability of the improved method to reduce the computation cost.