Share Email Print

Proceedings Paper

Scattering from multilayered random rough surfaces using the Steepest Descent Fast Multipole Method (SDFMM) and the multiple interaction model
Author(s): Magda El-Shenawee
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Scattering of electromagnetic waves from multilayered random rough surfaces is crucial for subsurface sensing applications. A multiple interaction method of moments (MoM) model is used in this work to analyze scattering from two-dimensional multilayered random rough ground (3-D scattering problem) especially when the underground layer is deeply buried under the air/ground interface. The presented model removes a barrier and enables the application of the Steepest Descent Fast Multipole Method (SDFMM) to certain 3-D non-quasi-planar structures. The conventional SDFMM has been used to analyze electromagnetic wave scattering from quasi-planar structures where the scatterer's height is a fraction of a free-space wavelength. The presented model is based on multiple interactions mechanism between the air/ground interface and the buried underground layer. The basic idea of the proposed multiple scattering model is to decompose the non-quasi-planar multilayered ground into two quasi-planar scatterers where the conventional SDFMM can be applied separately to each one. The interactions between the sub-quasi-planar scatterers are calculated using the electromagnetic vector potentials near-field expressions. This model is tested and validated with the MoM on a variety of geometries. The results show that the strongest signature of the buried scatterer is mainly due to the first multiple interaction mechanism (ground-object-ground) while the contributions from repeating this mechanism become insignificant even for lossless and/or slightly lossy underground.

Paper Details

Date Published: 13 August 2002
PDF: 12 pages
Proc. SPIE 4742, Detection and Remediation Technologies for Mines and Minelike Targets VII, (13 August 2002); doi: 10.1117/12.479075
Show Author Affiliations
Magda El-Shenawee, Univ. of Arkansas (United States)

Published in SPIE Proceedings Vol. 4742:
Detection and Remediation Technologies for Mines and Minelike Targets VII
J. Thomas Broach; Russell S Harmon; Gerald J. Dobeck, Editor(s)

© SPIE. Terms of Use
Back to Top