Title :
Improvement in heuristic UTD diffraction coefficient
Author :
El-Sallabi, H.M. ; Vainikainen, P.
Author_Institution :
Radio Lab., Helsinki Univ., Finland
Abstract :
Holm (see IEEE Trans. Antennas Propag., vol.48, p.1211-19, 2000) has proposed a heuristic UTD diffraction coefficient for nonperfectly conducting wedges as an extension to the heuristic one given by Luebbers (see IEEE Trans. Antennas Propag., vol.32, p.77-6, 2000). The present work improves limitations of Holm´s diffraction coefficient in the illumination region. The improved diffraction coefficient gives results that are very close to the Maliuzhinets (i.e. rigorous) diffraction coefficient. The improvement is valid for parallel and perpendicular field polarisations.
Keywords :
electromagnetic wave polarisation; geometrical theory of diffraction; Maliuzhinets diffraction coefficient; UTD; heuristic diffraction coefficient; nonperfectly conducting wedges; parallel field polarisation; perpendicular field polarisation; uniform geometrical theory of diffraction;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20030089
