Abstract:

The research on the diffraction from a wedge with anisotropic impedance has great contribution to radar detection, electromagnetic wave propagation and the design of high-frequency antennas, etc. To study the scattering by an anisotropic impedance wedge at skew incidence, the field diffracted by the edge should increase the terms related to the excitation of surface  waves. Considering the coupling of the electric field and the magnetic field, the perturbation technique based on classical uniform geometrical theory of diffraction (UTD) and Van der Waerden method are used to obtain a uniform expression for diffraction of the surface waves.