| Electrostatic discharge is a process of high voltage, strong electric field, the instantaneous large current pulse. It can cause interference with the electronic equipment not only because of conducting but also because of radiating. Therefore, researches on the distribution and effect of radiation field deriving from electrostatic discharge are very realistic, which can not only promote the existing test methods and platform, but also improve the capacity of electronic devices and systems against electrostatic discharge. In the antistatic test, we are most often using electrostatic discharge simulator, which is also called electrostatic discharge gun. So in order to make the results more accurate, while reducing calibration costs, developing an approach that in the laboratory can test the performance of electrostatic gun has become particularly practical significance.This paper studies two aspects of simulation and experiment. Firstly, simulations are made for contact discharge, electrostatic discharge, electrostatic discharge and metal cavity aperture coupling, which mainly study the variation of radiation and coupling E-field in and out of the cavity, get the changes regularity of radiation E-field in various positions, and we also get the changes of internal radiation field distribution in the metal cavity. Then radiation electric field deriving from electrostatic contact discharge was measured and investigated using the experimental method, which mainly studies the effect to radiation E-field due to the different discharge voltage and grounding direction, including time domain and frequency domain properties, and then the results of simulation was compared in the time domain. Finally a calibration method of ESD simulator is introduced, by discharge current waveform monitoring and research, qualitative analysis of the performance of electrostatic gun, which can be used in the laboratory to calibrate electrostatic gun, effectively improving the accuracy of antistatic test. |
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