Field strength prediction behind lossy dielectric obstacles by using the UTD

A comparison is made between the measured and theoretically predicted field strength in the shadow region of a lossy dielectric obstacle. The field is measured along a cylindrical arc behind the obstacle at a frequency of 50 GHz. The theoretical model uses the uniform theory of diffraction including corner, edge-to-edge, and edge-to-corner diffraction, heuristically extended to include effects of nonperfect conductivity. The agreement between the measured and theoretically derived results is excellent for both orthogonal polarisations considered. The field behind a lossy block-shaped obstacle proves to be less polarisation dependent than behind a perfectly conducting one.