Scattering by infinite cylinders of arbitrary cross-section by the method of finite differences

A new method is presented for computing the scattered field from conducting cylinders of arbitrary geometrical shape using finite differences. Two specific examples of planewave scattering, one by a circular cylinder and the other by a square cylinder, are given. The radar-cross-section calculation in each case converges, and the results are in very good agreement with known values. It takes less than half a minute to compute a single radar cross-section.