Experimental study on wideband electromagnetic radiation from plasma cloud

A wideband spectrum of electromagnetic radiation from the special explosive which differs from high explosive has been measured. Four broadband antennas were employed to observe pulse electromagnetic radiation from a spherical explosive. The frequency spectra from these experiments were analyzed using time/frequency Fourier methods. The results show that the EM pulse from the explosive with mass of 150 g lasted 50 ns with a sharp rise. The radiation mechanisms for the phenomenon are theoretically discussed, in order to make it clear how the energy radiates. It is suggested plasma radiation might be the source of the electromagnetic radiation detected by the antennas.