Transient field generation and measurement

The mathematical modeling and numerical computation of the elecromagnetic field radiated by a biconic antenna excited by a transient waveform such as a pulse are outlined. Very good agreement between the model and experiment is achieved for the time history of the radiated pulse. Amplitudes of calculated field strengths are within engineering tolerances. The type of field and its amplitude which result when any variant of biconic antenna is excited by a given input pulse can be predicted, since the time marching method of solving integral equations is shown to be successfully implemented on a computer. Because the system is not limited to single shot events, measurement of induced currents inside target equipments when illuminated by the radiation field is simplified, since sampling technology can be employed. Current waveforms which occur in antennas can also be predicted.