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Application of FDTD and Dynamic Differential Evolution for Inverse Scattering Problem Time Domain Inverse Scattering

This paper reports a two-dimensional timedomain inverse scattering algorithm based upon the finitedifference time domain method for determining the shape of a perfectly conducting cylinder. Finite difference time domain method (FDTD) is used to solve the scattering electromagnetic wave of a perfectly conducting cylinder. The inverse problem is resolved by an optimization approach and the global searching scheme dynamic differential evolution (DDE) is then employed to search the parameter space. By properly processing the scattered field, some electromagnetic (EM) properties can be reconstructed. A set of representative numerical results is presented to demonstrate that the proposed approach is able to efficiently reconstruct the electromagnetic properties of metallic scatterer even when the initial guess is far away from the exact one. KeywordsInverse Scattering, FDTD, Asynchronous particle swarm optimization (APSO), Cubic-Spline.