Equivalent Test Method for EMP Radiation Effect Into Shielded Multicore Wire

To address the significant challenges of testing the electromagnetic pulse (EMP) radiation effects on the shielded multicore wire coupling channel in large-scale weapon systems, a theoretical model has been developed that utilizes bulk current injection (BCI) as an equivalent substitute for high-field-intensity electromagnetic radiation. This model establishes equivalence based on the equal terminal responses of each wire pair under both radiated and injected conditions. The equivalent relationship between the injection source and the radiation field intensity for each wire pair is linear and uniform. This relationship, being independent of the terminal impedance at the equipment under test (EUT), enables the calculation of the equivalent injection waveforms. The equivalent testing method for strong EMP radiation effects is proposed and demonstrated by experimental validation. The average correlation coefficient of response curves for each wire pair in the pass-through load simulating the EUT test exceeds 0.9. The maximum error observed in the airborne computer effect test is 1.48 dB. The proposed method indicates that achieving equivalence for one wire pair’s terminal response under radiated conditions ensures equivalence for the remaining wire pairs as well, demonstrating applicability to nonlinear systems.