HYBRID BORN ITERATIVE METHOD IN LOW-FREQUENCY INVERSE SCATTERING PROBLEM

With its fast convergence, the distorted Born iterative method (DBIM) has been widely used in low-frequency inverse scattering analysis, how ever, its inherent drawback, sensitive-to-noise disturbance, may great ly limit its practical applications. In this paper, the numerical anal ysis is made to compare the DBIM and the Born iterative method (BIM). Then a hybrid BIM is presented. In this method, the DBIM is employed t o speed the solution convergence in the initial several iterations and the BIM is used to improve the solution stability in the later iterat ions. The switch condition is also given. The simulation results show that the method is valid for the inverse scattering solution.