Analysing SE in enclosures with apertures to achieve to the EMC standards by presenting an optimal routing for transmission conductors

Due to the importance of electromagnetic compatibility (EMC) issue, where electromagnetic interference (EMI) is evaluated, shielded enclosures have a valuable position. Shielding prevents internal electromagnetic energy from coupling to the environment and so reduces emissions; it also prevents external electromagnetic energy from the environment from coupling into the system and disrupting its operation, so improving the immunity. However, the precision of these enclosures is often compromised by all kinds of apertures that interconnect various components, equipment are needed for ventilation, control access and for viewing indicators. Therefore, appropriate shields for mitigation of electromagnetic interference in presence of apertures must be designed. So the shielding effectiveness (SE) of enclosure must be analyzed to achieve to the best structure of shielding enclosures with apertures. In this paper, we study the SE of the difference kind of shielding enclosure in presence of aperture. In the following an optimal routing is proposed in order to immunize the transmission cables within enclosure against EMI by using analytical hierarchy process (AHP).