Reconstruction of the Parameters of Debye and Lorentzian Dispersive Media Using a Genetic Algorithm

Jianmin Zhang
Marina Koledintseva, Missouri University of Science and Technology
G. Antonini
James L. Drewniak, Missouri University of Science and Technology
Konstantin Rozanov, Missouri University of Science and Technology
Antonio Orlandi

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A method for reconstruction of the parameters of the Debye or Lorentzian dispersive media is proposed. In this method, S-parameters of a simple parallel-plate fixture filled with the dispersive medium are measured and modeled using the transmission line equations, provided a single TEM mode propagating in this parallel-plate waveguide. The genetic algorithm is used for searching the parameters of the dispersive medium by means of minimizing the discrepancy between the measured and modeled S-parameters. The results are verified using the full-wave FDTD modeling technique.