Title :
Parallel 3D PML-FDTD simulation of GPR on dispersive, inhomogeneous and conductive media
Author :
Chew, W.C. ; Teixeira, F.L. ; Straka, M. ; Oristaglio, M.L. ; Wang, T.
Author_Institution :
Dept. of Electr. & Comput. Eng., Illinois Univ., Urbana, IL, USA
Abstract :
A 3D FDTD simulation of a ground penetrating radar (GPR) is described. The soil material is characterized by inhomogeneities, conductive loss and strong dispersion. The dispersion is modelled by a N-th order Lorentz model and implemented by recursive convolution. The perfectly matched layer (PML) is used as an absorbing boundary condition (ABC). This formulation facilitates the parallelization of the code. A code is written for a 32 processor system. Almost linear speedup is observed. The results include the radargrams of buried objects.
Keywords :
convolution; digital simulation; dispersion (wave); electrical conductivity; electromagnetic wave propagation; finite difference time-domain analysis; object detection; parallel processing; radar applications; radar computing; simulation; transient analysis; Lorentz model; absorbing boundary condition; buried objects; conductive loss; conductive media; dispersive media; electric dipole; ground penetrating radar; inhomogeneous media; linear speedup; parallel 3D PML-FDTD simulation; perfectly matched layer; processor system; radargrams; recursive convolution; soil material; transient electromagnetic measurements; Boundary conditions; Buried object detection; Conducting materials; Convolution; Dispersion; Finite difference methods; Ground penetrating radar; Perfectly matched layers; Soil; Time domain analysis;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1997. IEEE., 1997 Digest
Conference_Location :
Montreal, Quebec, Canada
Print_ISBN :
0-7803-4178-3
DOI :
10.1109/APS.1997.630170
