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Shielding effectiveness(SE)of materials of current testing standards is often carried out by using continuous-wave measurement and amplitude-frequency characteristics curve is used to characterize the results.However,with in-depth study of high-power electromagnetic pulse(EMP)interference,it was discovered that only by frequency-domain SE of materials cannot be completely characterized by shielding performance of time-domain pulsed-field.And there is no uniform testing methods and standards of SE of materials against EMP.