Dispersive FDTD Scheme and Surface Impedance Boundary Condition for Modeling Pulse Propagation in Very Lossy Medium

Lai, Z.-H.Z.-H.LaiJEAN-FU KIANG2021-05-052021-05-052020https://www.scopus.com/inward/record.url?eid=2-s2.0-85078001861&partnerID=40&md5=6fa086bd0bba19fcf354ed09e6fb7e1bhttps://scholars.lib.ntu.edu.tw/handle/123456789/559015A dispersive surface impedance boundary condition (SIBC) is implemented in a dispersive finite-difference time-domain (FDTD) scheme to model pulse propagation and scattering from an aquifer, which has high permittivity and high conductivity. A quadratic complex rational function (QCRF) is adopted to model the dispersive media over a wide frequency band for implementing the dispersive FDTD scheme. The proposed method is demonstrated by simulating the operation of ground-penetrating radar (GPR) in detecting water table. Group delay and pulse-broadening parameter (PBP) are defined to analyze the deformation of pulses propagating in a dispersive lossy medium.[SDGs]SDG6Dispersive FDTD Scheme and Surface Impedance Boundary Condition for Modeling Pulse Propagation in Very Lossy Mediumjournal article10.1109/TAP.2019.29636152-s2.0-85078001861WOS:000527697600057