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IEEE Transactions on Antennas and Propagation
Volume 48 Number 3, March 2000

Table of Contents for this issue

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Inverse O bstacle Scattering for Homogeneous Dielectric Cylinders Using a Boundary Finite-Element Method

Stéphane Bonnard, Patrick Vincent and Marc Saillard

Page 393.

Abstract:

A method for reconstructing the shape and the permittivity of a penetrable homogeneous cylinder is described. It is the extension to penetrable cylinders of a previous work dealing with perfectly conducting cylinders. A low-frequency approximation is used to determine an initial guess. Then,a rigorous boundary integral method permits us to reconstruct arbitrary shapes and complex permittivities. It is based on an iterative conjugate gradient algorithm requiring the solving of two direct diffraction problems only. A simple and original regularization scheme is presented, which ensures the robustness of the algorithm. Numerical examples with lossy embedding media and additional random noise for both E// and H// polarizations are given.

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