Time varying electromagnetic fields generated by electrostaticdischarges

摘要

This paper presents the time domain measurements of current andelectromagnetic fields generated by electrostatic discharges (ESD).Electromagnetic fields a few centimetres away from the ESD were measuredin time domain using passive near field probes. The time domain signalswere converted into the frequency domain by FFT, and antenna correctionfactors were applied. The ESD current was generated by an ESD generator.A typical ESD current of 10 A with 25 ns rise time can create a magneticfield of the order of 70 μT at a distance of 10 mm from the ESD andan electric field of the order of 6 kV/m at a distance of 30 mm from theESD. The variation of these electromagnetic fields with distance fromthe discharge is also investigated