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Numerical Derivation of Diffraction Coefficients Using a Method of Moments With Incorporated Absorbing Boundaries

2017; IEEE Antennas & Propagation Society; Volume: 16; Linguagem: Inglês

10.1109/lawp.2017.2651740

1548-5757

Giorgos Karagounis, D. De Zutter, Dries Vande Ginste,

Electromagnetic Simulation and Numerical Methods

In this letter, a method is presented to numerically derive uniform theory of diffraction-like diffraction coefficients for canonical structures. To deal with the semi-infinite nature of these nonstandard structures, the coordinate stretching formulation of a perfectly matched layer is integrated into a method-of-moments-based boundary integral equation solver. The method is validated for diffraction of a plane wave at a perfectly electric conducting (PEC) slab and further, by way of example, applied to a pencil-shaped PEC and a brick wall slab.