Electromagnetic diffraction of an obliquely incident plane wave field by a wedge with impedance faces
Abstract
A uniform asymptotic solution is presented for the electromagnetic diffraction by a wedge with impedance faces and with included angles equal to 0 (halfplane), pi/2 (rightangled wedge), pi (twopart plane) and 3 pi/2 (rightangled wedge). The incident field is a plane wave of arbitrary polarization, obliquely incident to the axis of the wedge. The formal solution, which is expressed in terms of an integral, was obtained by the generalized reflection method. A careful study of the singularities of the integrand is made before the asymptotic evaluation of the integral is carried out. The asymptotic evaluation of the integral is performed taking into account the presence of the surface wave poles in addition to the geometrical optics (GO) poles near the saddle points. This results in a uniform solution which is continuous across the shadow boundaries of the GO fields as well as the surface wave fields.
 Publication:

IEEE Transactions on Antennas and Propagation
 Pub Date:
 July 1988
 DOI:
 10.1109/8.7201
 Bibcode:
 1988ITAP...36..956R
 Keywords:

 Electromagnetic Scattering;
 Electromagnetic Surface Waves;
 Geometrical Optics;
 Plane Waves;
 Saddle Points;
 Asymptotic Methods;
 Electrical Impedance;
 Half Planes;
 Incidence;
 Matrices (Mathematics);
 Obliqueness;
 Wedges;
 Communications and Radar