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Current distribution cAlculations Antenna design and simulations Current distributions on metallic plates Inverse scattering simulations Radargrams of buried pipes Experimental inverse scattering
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Radargrams of Buried Pipes
The following Figures have been obtained from the FDTD simulation
of radargram traces of a metallic pipe buried 2m deep
on a dipersive soil (Puerto Rico clay loam with 2.5, 5, and 10 % of
moisture respectively).
The FDTD simulation includes the dispersion
effect through Debye models and use of the PLRC method.
The computational domain is truncated using the PML absorbing boundary
condition extended to match dispersive media. As the soil moisture is
increased, the echo appears later and weaker.
 Radargram trace of a metallic pipe with 2.5% moisture  Radargram trace of a metallic pipe with 5.0% moisture  Radargram trace of a metallic pipe with 10.% moisture
The next two Figures result from the FDTD simulations of pulse propagation
in 2-D cylidrical and 3-D spherical grids, respectively.
The cylindrical and spherical grids include 8-layers cylindrical and
spherical PML. The insets show the same simulations without the use of
the PML.
 Pulse propagation in 2-D cylidrical grid  Pulse propagation in 3-D spherical grid The above work is a collaboration between Fernando Teixeira and Prof. Weng Cho Chew. Please send suggestions, comments, and inquiries to: fteixeir@cspark.ece.uiuc.edu.
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