MODELING OF ELECTROMAGNETIC-WAVE SCATTERING BY CONCRETE SPECIMENS

This paper presents a novel application of finite difference-time doma in (FD-TD) modeling to concrete to study the interaction of concrete w ith electromagnetic waves. The purpose of this work is to visualize th e propagation of the electromagnetic fields in a dielectric medium of concrete in an effort to obtain one-dimensional images of a concrete t arget for nondestructive testing purposes. A Gaussian pulse plane wave is directed to laboratory size concrete specimens as an excitation so urce. Snap shots of computer simulation are shown to display wave prop agation and scattering through and by the concrete specimens. Geometry of the targets is varied with different dimensions, and with or witho ut an inclusion.