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Improved microwave imaging procedure for nondestructive evaluations of two-dimensional structures

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4 Author(s)
Caorsi, S. ; Dept. of Electron., Univ. of Pavia, Italy ; Massa, A. ; Pastorino, M. ; Donelli, M.

An improved microwave procedure for detecting defects in dielectric structures is proposed. The procedure is based on the integral equations of the inverse scattering problem. A hybrid genetic algorithm (GA) is applied in order to minimize the obtained nonlinear functional. Since in nondestructive evaluations the unperturbed object is completely known, it is possible off-line to numerically compute the Green's function for the configuration without defects. Consequently, a very significant computation saving is obtained, since the "chromosome" of the GA codes only the parameters describing the unknown defect.

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Antennas and Propagation, IEEE Transactions on  (Volume:52 ,  Issue: 6 )