Two integral equations for modeling electromagnetic scattering from indented screens

This paper discusses three aspects for characterizing electromagnetic scattering from indented screens or cavity structures using integral equations. The first aspect is on the derivations of two integral equations using physical models. Both integral equations involve only the electric current density on the cavity walls. The second aspect is on numerical verification of the two integral equations by calculating monostatic scattering from three-dimensional rectangular cavity structures. The numerical results show the correctness of the two integral equations. The third aspect is on the comparison of the numerical behavior of the two integral equations, as regards accuracy and convergence.