A parametric formulation of the UTD diffraction coefficients for a dielectric wedge

A new approximation for the diffraction coefficient for dielectric wedges is presented using curve-fits based on the inverse problem theory. It is shown that significant improvement over existing heuristic formulations can be obtained by polynomial curve-fitting of the multiplying factors in the UTD diffraction coefficients. Although this solution is based on a parametric analysis for a right-angle dielectric wedge, it is conjectured to be extensible to geometries with arbitrary angles. The construction of a UTD-like form for the diffraction coefficient is essentially a reasonable simplification of the exact solution in the sense that the most important terms in series expansions of the multiplying factors constitute the primary components of the diffraction coefficient. Therefore, the proposed method potentially allows faster and more accurate propagation modeling. Further work is required to see if this is a viable generic approach.