In this paper, the inverse scattering of an imperfectly conducting cylinder with corners is given by the Firefly Algorithm. The inverse problem is first transformed into a nonlinear optimization problem, and then solved by the Firefly Algorithm. To treat a target with corners, the target shape is modeled by the cubic spline interpolation. The Firefly Algorithm utilized in this study is a biologically inspired algorithm. It has been proved to be efficient with high success rate. Since the inverse scattering involves complicated computation, the Firefly Algorithm is a good candidate for reconstructing the target information.
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