Theoretical and experimental evaluation of electromagnetic fields radiated by ESD

The paper describes applications of a field reconstruction technique, and in particular comparisons between theoretical results and measured data are reported. The developed method requires the knowledge of the transfer function of a commercial sensor, in amplitude and phase, in a range of frequencies wider than the significant bandwidth of the expected field radiated from the transient current. A simple numerical code reconstructs the incident field waveform from the probe output signal. Moreover, a comparison between transient fields measured by a commercial active field probe and by magnetic field sensor are also shown. Satisfactory results are achieved in both tests, and highlight that a simple and cheap technique is reliable and effective to measure fast varying fields.