New development of an approximate UTD ray solution for diffraction of an oblique incident plane wave by a planar material junction

An approximate UTD ray solution of an oblique incident wave for analyzing an electromagnetic (EM) wave diffracted by a planar material junction has been developed in this paper. The proposed approximated UTD solution is based on an ansatz obtained from the Weiner-Hopf (W-H) solution by approximate W-H split function into a simple function. This leads the proposed solution is relatively simple and closed form expression which is suitable for engineering applications. Also, the proposed proximate UTD solution overcomes all of limitations from previous approximate UTD solutions. To verified accuracy of the proposed solution UTD solution, W-H solution used as a reference solution. The comparison between the proposed UTD solution and the W-H solution shows very good agreement for all the co and cross-polarizations.