Simulation analysis of time domain and frequency domain test methods of electromagnetic shielding effectiveness of materials

In this paper, the shielding effectiveness of planar material was calculated by time and frequency domain simulation. The time domain method is to calculate time domain response of the material under the electromagnetic pulse; the frequency domain method is to calculate frequency domain response of the material under the continuous wave. By comparing time domain and frequency domain results, it is found that SE calculated by transient method is consistent with frequency domain SE, so the shielding characteristics of materials can be analyzed by narrowband pulse test. The conclusions can help us to study the EMC and EM protection of electronic devices and systems.