Reducing the effect of high-power electromagnetic waves on electrical equipment

Abstract

Electromagnetic threats are considered to be among the latest threats to electrical devices. Therefore, it appears essential to identify such threats and their deployment scenarios in order to present electromagnetic shielding solutions and prevent disruption in the functioning of electrical devices. The aim of this paper was to introduce electromagnetic threats and propose solutions to shield electrical devices from such threats. Therefore, a sort of cavity was proposed to shield a computer unit from electromagnetic waves. Placing apertures on different sides of such cavities for air conditioning and cable accessories was inevitable. Thus, CST was employed to simulate such cavities with respect to the positions of apertures, their geometrical shapes, and their quantity. The simulations were performed in the 1-5 GHz frequency range. The SE value for a casing with circular apertures is initially calculated. Finally, the SE value is calculated for a case where gaps are added to the casing in order to understand the effect of gaps. The simulation results indicated that the proposed method could reduce the effect of waves in a completely successful way. © 2015 IEEE.