One-Dimensional Electromagnetic Inversion Using Particle Swarm Optimization

An electromagnetic inversion method for the reconstruction of the permittivity profile of a multilayered medium is proposed. The inversion is based on global optimization of a fitness function using particle swarm optimization algorithm. The fitness function describes the error between observed data and synthetic data obtained from solving the forward problem. A gradient based method is used as a second step to obtain better accuracy of the solution with less computation time. Two different reconstructing models for the permittivity profiles are used. The method is applied to dielectric slabs with different permittivity profiles. Random noise is added to the data to study its effect. The reconstruction process is performed in each case with satisfactory results.