On the interpretation for radiation from simple current distributions

It is indisputable that Maxwell´s equations provide a unique electromagnetic field for any reasonable distribution of charge/current. However, the interpretation of the results from such calculations may not be unique; different physical models may be used to explain the same results. We examine the radiation from similar filamentary current distributions (traveling-wave and uniform) for pulse excitation. For pulse excitation, it is easier to establish the causal relationship between the elements of current and the radiated field. We also show, for these simple distributions, that the total energy radiated for pulse excitation depends on the length of the filament in the same way as for the time-harmonic case