Modeling for electromagnetic pulse shielding effectiveness in time domain

Electromagnetic pulse can damage electronic equipment through conduction coupling and radiation coupling two ways. The shielding effectiveness is an important parameter describing the shielding performance of the material. At present, most standards and specifications specify the shielding effectiveness of materials in the frequency-domain. A time domain experimental system of materials shielding effectiveness was presented. The time domain transfer function model of materials was achieved based on system identification theory. The transfer function model accurately forecasted the waveforms when the square wave or electromagnetic penetrates through the metal fabric material. The results show that this time domain test system can be used to evaluate materials shielding effectiveness against electromagnetic pulse. The transfer function model of the material can be used to forecast the waveform of electromagnetic pulse penetrating through the material.