FDTD MODELING OF SCATTERERS IN STRATIFIED MEDIA

The FDTD technique is well suited for calculating the fields scattered by buried objects when the sources are close enough to the air/ground interface so that they can be incorporated into the solution space, D ifficulties arise, however, when the sources are far from the interfac e since the total fields in the solution space are not all outgoing wa ves, Using well-known formulas for the fields transmitted and reflecte d by stratified media, this paper discusses a method whereby the field s scattered by a buried object can be easily calculated by the FDTD te chnique when the incident field is a plane wave.