Electromagnetic Shielding Effect of Open Metal Cavities and Plasma Arrays Against Strong Electromagnetic Pulses

High-intensity electromagnetic pulse (EMP) may cause a seriously destructive effect when it couples into the interior of electronic equipment. Due to the nonlinear effect, the plasma can shield the strong EMP. The aperture coupling model of strong EMP is established by CST EM calculation software, and the influence of aperture position and size of the high-amplitude EM pulse (HEMP) coupling effect is studied. In addition, the protective performance of a single-layer plasma array against nuclear EMP is discussed. The simulation results show that the damage efficiency of HEMP can be weakened to a certain extent by reasonably controlling the position and size of the aperture. The experience results show that loading plasma in the opening gap has the ability of strong EMP protection. Therefore, it is of great significance to study the open metal cavities and plasma for HEMP protection technology.