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FDTD Simulation of Ground Penetrating Radar Signal in 3-Dimensional Dispersive Medium

LIU Si-xin, ZENG Zhao-fa, XU Bo   

  1. College of GeoExploration Science and Technology, Jilin University, Changchun 130026, China
  • Received:2005-03-10 Revised:1900-01-01 Online:2006-01-26 Published:2006-01-26
  • Contact: LIU Si-xin

Abstract: To study propagation characteristic of radar wave in a dispersive medium, frequencydependent flux density D was introduced, and electromagnetic field E and flux density D were normalized. A finite difference time domain (FDTD) algorithm is developed to solve Maxwell’s equation in a dispersive medium, in which the dielectric constant varies with frequency and Debye relationship is satisfied. Assumed dielectric constant and magnetic permeability were introduced to realize the nonreflectively absorbing, which avoids the split of wave components in normal Berenger PML. Simulated example illustrates the wave propagation in a dispersion medium.

Key words: ground penetrating radar, Maxwell’s equations, finite difference time domain, dispersive medium

CLC Number: 

  • P631.325
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