Measurement of Impulsive Electromagnetic Field Caused by ESD Using A Folded Long-Hexagon Antenna and It’s Transient Characteristics

Impulsive transient electromagnetic fields caused by electrostatic discharge (ESD) have a serious influence on modern IT high-tech equipment. However, the mechanism and transient characteristics of electromagnetic noise radiation by ESD have not yet been fully elucidated. In this study, we experimentally investigated the effect of electrode size on the electromagnetic radiation mechanism of ESD. Impulsive transient electromagnetic fields due to ESD were measured using a folded long-hexagon antenna (FLHA) with wideband and flat phase characteristics to 20 GHz band width. As a result, it was confirmed that the electric field strength was enhanced in proportion to the size of the electrode. In addition, changes in electrode diameter and peak frequency were confirmed. It was found that the electrode structure is strongly related to the ESD noise radiation mechanism.