The surface wave phenomenon on an impedance half-plane

Abstract

The excitation of surface waves on an impedance half-plane is investigated by considering the complex integral of scattering. The poles of the split function are examined with respect to some criteria, obtained from an inhomogeneous plane wave. It is shown that two poles of the complex integral lead to null fields. The surface wave expressions were derived according to the remaining two poles. The diffraction of the surface waves at the edge discontinuity of the half-plane is studied by using the theory, developed for grazing incidence. The uniform representation of the diffracted field is performed according to the uniform theory for evanescent waves. The behaviors of the obtained field expressions were examined numerically.