Wideband Electromagnetic Scattering/Analysis Program. Far Zone Electromagnetic Scattering from Complex Shapes Using Geometrical Theory of Diffraction.

摘要

Backscatter and bistatic scattering in the far zone using the uniform theory of diffraction (UTD) from shapes which require second and higher order interactions to get an accurate solution over a wide range of angles is considered. One of the simplest of these shapes is the two-dimensional dihedral. The solution contains interactions of up to third order, which provide excellent results for the dihedrals of 60 deg or greater and for sizes larger than one wavelength in extent. The dihedral solution is modified for curvature and caustic corrections to get results for the top-hat, bruderhedral, and bi-cone. Another extension to the dihedral is the parallel plate cavity and the circular cavity. First and second order caustic corrections for the donut are included. Also, the result of the dihedral is modified to get results for the multi-joined cylinders made of PVC pipes filled with absorber. Analytical results are validated against method of moments or measurements.