Electromagnetic scattering by simplified crack models on conducting ground plane

This paper analyzes electromagnetic scattering problems for simplified crack models, based on the formulation of the Kobayashi Potential (KP) method. Here, three types of simple crack models, a flanged waveguide, a rectangular trough, and a thick slit, are considered. The derived far zone field representations are utilized to obtain the approximate formulae of the scattered fields for the models.