On the Discontinuous Galerkin Integral Equation for Half-Space Scattering Problems

Aiming to the efficient electromagnetic scattering analysis from multiscale targets in half-space, the discontinuous Galerkin method is considered in this work. It is found that the widely used mixed-potential integral equation requires proper modifications in order to impose current continuity and zero charge accumulation conditions on the neighboring subdomain contours. Numerical examples and comparisons are carried out to demonstrate the accuracy, versatility, and flexibility of the discontinuous Galerkin scheme in half-space scattering problems.