说明：  This program is a very basic three-dimensonal FDTD program with a source in the middle of the problem space.This similar to the two dimensonal problem but here we assume that the source is not a point source. A simple Dipole Antenna consists of two arms where the current will flow and that causes the radiation. Here un this simulation i just create a gap in between its two arm and create a free space region where i am launch the Gaussian Pluse and there after i see the response in free space.It will simple flowe the Ampere s Circuit law to govern this uper radiation equation. MATLAB release MATLAB 7.0.4 (R14SP2)