FDTD; dispersive media; concrete materials; Newton iterative method
Issue Date
2013-10
Publisher
Electronics and Telecommunications Research Institute(한국전자통신연구원)
Citation
ETRI JOURNAL, 2013, 35(5), P.915-918
Abstract
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.