Abstract: In this paper, the forward scattering problem is analyzed by using the FD-MEI (finite difference measured equation of invariance) method. The far fields are then obtained by the equivalence principle and the asymptotic expression of Green's function. The objective function is constructed in terms of the maximum of difference between the computed scattering fields and the measured fields, and scattering cylinder is reconstructed through optimization of objective function with the genetic algorithm. Some numerical results of the reconstruction are presented.

Key words: imaging, genetic algorithm, electromagnetic scattering, inverse problem, finite difference method