Abstract: The energy transmission characteristic of transient electromagnetic pulses is analysed and verified when Gaussian pulses are fed to antennas. The uniformly distributed circular current is simplified as a point radiation source according to the analysis and verification of energy transmission characteristic when far field of antenna is studied. On basis of this simplification for radiation source, the analysis and verification of energy transmission characteristic with arrayed elements have been completed. Transmission energy along z axis comes from superposition of transient electromagnetic waves rather than photon quantum characteristic of Maxwell equations for radiation sources.