6 July 2000 Discrete dipole approximation: a numerical tool for subsurface sensing
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Abstract
We present a method to simulate scattering of microwaves in realistic soil representations. Our results will be used by the designers of a new microwave antenna for humanitarian mine clearance being developed within the European Project PICE. We aim to identify scenarios giving false alarm signals and search for means to avoid these conditions. We use the Discrete Dipole Approximation (DDA), a method originally developed to study the scattering of light by particles in interstellar dust. The DDA simulates the scattering objects by a lattice of electric dipoles and calculates the total scattering as the contribution of all the dipoles in the lattice to the total field. It is a very suitable method to study electromagnetic scattering by objects of irregular shape and by clusters of them. We have successfully applied DDA to the analysis of light scattering by clusters of many thousands of particles, simulating pigments in paper coatings.
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Teresita B. Quinteros, Teresita B. Quinteros, Brent Martin Nebeker, Brent Martin Nebeker, Odd Lovhaugen, Odd Lovhaugen, Hakon Sagberg, Hakon Sagberg, } "Discrete dipole approximation: a numerical tool for subsurface sensing", Proc. SPIE 4129, Subsurface Sensing Technologies and Applications II, (6 July 2000); doi: 10.1117/12.390639; https://doi.org/10.1117/12.390639
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