Scattering from a perfectly conducting surface with a sinusoidal height profile: TM polarization

A numerical-integral equation approach is used to explore plane-wave scattering from a nonplanar surface with a sinusoidal height profile for the case of the magnetic field parallel to the surface ridges (TM polarization). The results are compared to those found previously by the authors for the TE polarization. The TM case is more sensitive to the height of the sinusoid and shows shape resonate effects which are characterized by a large increases in the surface current. A "Brewster angle" complete null of the specular reflection is also present and tends to be broader and more strongly emphasizes the anomalies which occur at the Rayleigh wavelengths. The failure of two anomalies to coalesce at the crossing of two Rayleigh wavelength conditions is also explored.