Research on effect of loop cable coupling within the cavity of EMP

Based on FDTD theories and algorithms, through CST modeling and simulation, the article analyses the rules of nuclear electromagnetic pulse on loop cable coupling within the cavity. The following conclusions were obtained: for loop cable wires, when the polarization direction of the magnetic field in the cavity is perpendicular to the loop plane, the magnetic inductive current is maximum, and in the loop, the coupling current of the cable which is parallel to the direction of the electric field is maximum, and coupled energy on its cable is also proportional to cable resistance value. The conclusion provides the important basis for NEMP protection.