Electromagnetic scattering from two-layer rough interfaces in the Kirchhoff approximation |
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| Authors: | Wang Rui Guo Li-Xin and Ma Jun |
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| Affiliation: | School of Science, Xidian University, Xi'an 710071, China |
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| Abstract: | Electromagnetic wave scattering from multilayers consisting of two
two-layer Gaussian rough surfaces with lossless media is
investigated in the Kirchhoff approximation (KA), with consideration of
the shadowing effects. The tapered incident wave is introduced into
the classic KA, and the bistatic scattering coefficient is
redetermined. The advantage of this method is that it is faster in
computation than the exact numerical methods. The numerical results
show that the bistatic scattering coefficient calculated in the KA
is in good agreement with that obtained by using the method of
moment (MOM) over a most angular range, which indicates the validity
of the KA proposed in our paper. Finally, the effects of the
relative permittivity, the root-mean-square (RMS) height, the
correlative length, and the average height between the two
interfaces on the bistatic scattering coefficient are discussed in
detail. |
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| Keywords: | two-layer Gaussian rough
surface Kirchhoff approximation tapered wave |
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