Title :
On the Effect of Support Estimation and of a New Model in 2-D Inverse Scattering Problems
Author :
Catapano, Ilaria ; Crocco, Lorenzo ; D´Urso, Michele ; Isernia, Tommaso
Author_Institution :
IREA-CNR, Napoli
fDate :
6/1/2007 12:00:00 AM
Abstract :
Starting from the concept of "degree of non-linearity" of the relationship amongst unknown parameters and scattered fields, we discuss how knowledge of the geometrical features of the targets favorably affects the solution of inverse scattering problems. The same concept is also exploited to optimize the contrast source-extended Born (CS-EB) model, resulting in the optimized CS-EB (O-CS-EB) inversion approach, which remarkably reduces false solutions occurrence. Then, a two-steps approach is proposed as a reliable and effective inversion strategy. The first step consists in retrieving the shape of the targets using the linear sampling method, while in the second step, the estimated shapes and the O-CS-EB are exploited to reconstruct the permittivity profile. The approach has been tested against experimental data, showing that very accurate reconstructions are achieved from monochromatic data.
Keywords :
electromagnetic wave scattering; estimation theory; image reconstruction; inverse problems; permittivity; sampling methods; 2D inverse scattering problems; contrast source-extended Born model; geometrical features; linear sampling; permittivity profile; scattered fields; support estimation; Electromagnetic scattering; Image reconstruction; Inverse problems; Optimization methods; Permittivity; Sampling methods; Scattering parameters; Shape; Solid modeling; Testing; Contrast source-extended Born (CS-EB); electromagnetic inverse scattering problems; shape reconstruction;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2007.898647