The behavior of very large short pulse antennas

The electromagnetic behavior of a pulsed array of radiating elements exhibit marked differences from standard continuous wave (CW) behavior when the physical size of the array, D, exceeds the physical pulse length, cT (speed of light times pulse duration). Herein a simple analytical model and the results of compute code calculations which explain and illustrate those differences are presented. The behavior of these very large transient antennas (VLTA) is elaborated by using computer codes to illustrate the effects on the radiation pattern when the radiators exhibit randomness of turn-on time or phase.