Accurate FDTD Dispersive Modeling for Concrete Materials. Issue 5 (1st October 2013)

• Record Type: Journal Article
• Authors: Chung, Haejun; Cho, Jeahoon; Ha, Sang‐Gyu; Ju, Saehoon; Jung, Kyung‐Young
• Is Part Of: ETRI journal. Volume 35:Issue 5(2013)
• Page Start: 915
• Page End: 918
• Publication Date: 2013-10-01
• Subjects: FDTD -- dispersive media -- concrete materials -- Newton iterative method; Telecommunication -- Periodicals; Electronics -- Periodicals; Electronics; Telecommunication; Periodicals; Periodicals; 621.38205
• DOI: 10.4218/etrij.13.0212.0491
• Languages: English
• ISSNs: 1225-6463

Abstract

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.