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A fast converging series expansion for the 2-D periodic Green's function based on perfectly matched layers

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2 Author(s)
Rogier, H. ; Inf. Technol. Dept., Ghent Univ., Belgium ; De Zutter, D.

A new formalism based on perfectly matched layers (PMLs) is proposed to derive a fast converging series expansion for the two-dimensional periodic Green's function of layered media. The series combines a modal expansion for the waveguide formed by the layered medium terminated by PMLs with a truncated periodic Green's function series in the spatial domain. The efficiency of the new approach is illustrated by studying the scattering by a grid of metallic wires, both in free space and embedded in a dielectric slab. It is shown that the new technique results in a significant speed up compared to existing approaches.

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:52 ,  Issue: 4 )