On the GTD scattering by a polygonal cylinder
Abstract
When Keller's (1957) geometrical theory of diffraction (GTD) is used, the field diffracted by a wedge is infinite at the shadow and reflection boundaries. In general, uniform diffraction coefficients must be used to provide continuous fields at these boundaries. It is shown that by properly adding the singular contributions from a pair of adjacent edges, Keller's diffraction coefficients yield a continuous far-zone field at the reflection boundaries of a polygonal cylinder illuminated by a plane wave. The procedure is justified by noting that the uniform diffraction coefficients reduce to the Keller diffraction coefficients for this case.
- Publication:
-
IEEE Transactions on Antennas and Propagation
- Pub Date:
- January 1976
- DOI:
- 10.1109/TAP.1976.1141294
- Bibcode:
- 1976ITAP...24...94M
- Keywords:
-
- Cylindrical Bodies;
- Electromagnetic Scattering;
- Far Fields;
- Ray Tracing;
- Wave Diffraction;
- Geometry;
- Plane Waves;
- Polygons;
- Wave Reflection;
- Wedges;
- Communications and Radar