Accurate FDTD Dispersive Modeling for Concrete Materials

ETRI Journal

关键词: Newton iterative method;    concrete materials;    dispersive media;    FDTD;   

Others  :  1193713
DOI  :  10.4218/etrij.13.0212.0491

【 摘 要 】

This work presents an accurate finite-difference time-domain (FDTD) dispersive modeling of concrete materials with different water/cement ratios in 50 MHz to 1 GHz. A quadratic complex rational function (QCRF) is employed for dispersive modeling of the relative permittivity of concrete materials. To improve the curve fitting of the QCRF model, the Newton iterative method is applied to determine a weighting factor. Numerical examples validate the accuracy of the proposed dispersive FDTD modeling.

   

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