Recent developments in high-frequency diffraction methods and their technical applications

Kurzfassung

The talk has outlined recent research efforts aimed at extending the methods of high-frequency diffraction and scattering analysis, like PTD and GTD, onto non-metallic scattering objects. This is an important practical problem because of the growing use of non-metallic and composite materials in modern vehicle construction and antenna design. More accurate account for the real electrical properties of the propagation environment (terrain features, walls of building, etc.) is a hot topic on the agenda of the research work going on in the area of mobile and fixed-point radiowave communications. The talk has discussed the theoretical tools and the sort of solutions needed to efficiently deal with high-frequency electromagnetic scattering from non-metallic scattering surfaces which may be smooth or/and have edges and conical points.