Simulation research on electromagnetic pulse coupling surface current measurement

In order to accurately measure the surface current of the equipment under powerful electromagnetic environment, it is necessary to analyze the theory of surface current density and estimate the measurement method via comprehensive simulation. In this research, firstly, the basic principle of surface current measurement is given, then the field enhancement effect of the detector is analyzed. Based on the electromagnetic simulation software CST, the surface current density distribution of the metal shell is simulated, next, the uniformity of magnetic field on the surface of the shell is provided. Furthermore, it is verified that the existence of surface current detector will lead to field enhancement effect similar to the case of electric field measurement. The variables affecting the enhancement factor is simulated and analyzed in detail. Finally, a conclusion is given. This research can supply technical support for the manufacture and usage of surface current detectors.