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A Robust Method for the Computation of Green's Functions in Stratified Media

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3 Author(s)
Polimeridis, A.G. ; Aristotle Univ. of Thessaloniki, Thessaloniki ; Yioultsis, T.V. ; Tsiboukis, T.D.

Closed-form Green's functions for unbounded planar stratified media are derived in terms of cylindrical and spherical waves. The methodology is based on a two-level approximation of the spectral-domain representation of Green's functions. This robust, efficient, and fully numerical approach does not call for an analytical extraction of ldquoproblematicrdquo behaviors, such as the quasi-static terms and the surface wave poles, prior to the spectrum fitting. Instead, the spatial-domain Green's functions derived in this paper provide an accurate description of both the near-field singularity in the vicinity of the source and the far-field dominant behavior of the surface waves.

Published in:

Antennas and Propagation, IEEE Transactions on  (Volume:55 ,  Issue: 7 )