Coupling Effect of Uwb-emp on Irregular Cavity

The electromagnetic coupling effect on the irregular cavity which is acted by ultra wide band electromagnetic pulse (UWB-EMP) is studied. First, an irregular cavity structure model is established by using electromagnetic numerical calculation software (CST). Second, based on the model, the influences of UWB-EMP on the irregular cavity coupling efficiency are analyzed, when its rise time and pulse width change. Simulation show that: the shorter the rise time is, the better the coupling efficiency is gotten; pulse width almost has no influence on coupling efficiency. Furthermore, the signal frequency distribution of the typical positions in the cavity model are analyzed, which helps to improve the electronic equipment anti intense electromagnetic pulse interference abilities. The research results have an important guiding significance to improve the protection ability of the typical electronic equipment to UWB-EMP in practice.