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A Generalized Uniform Theory of Diffraction Method for Complex Illumination Sources Accounting for Multiply-Diffracted Rays
Karagounis, Giorgos
De Zutter, Daniel
Vande Ginste, Dries
Computational Electromagnetics International Workshop (CEM), 2015-7-1 ~ 2015-7-4, pp 54-55, 2015
Summary
A new formalism is presented that generalizes the use of the uniform theory of diffraction (UTD) to arbitrary illumination sources. The formalism returns the field in terms of a multipole expansion inside an extended observation region. When multiple UTD canonical objects are present, the multiplydiffracted rays can conveniently be superimposed. As an example, the scattering of a higher-order Hermite-Gaussian beam at a perfectly electrically conducting slit is examined.
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