Electromagnetic coupling evaluation of small metal enclosures with apertures using analytical, numerical and measurement analysis

We have presented an analytical analysis of the shielding effectiveness of small metal enclosures with apertures by the Roinson model based on the theory of transmission line circuits, as well as a numerical analysis by the finite-difference time-domain method (FDTD) and finite integgration technique (FIT) under the CST Software software, the results returned by these methods were compared with those provided by the measurement, the comparative study reveals a good agreement between the simulation and the measurement. The study carried out in this article has resulted in very significant results allowing to solve electromagnetic compatibilty (EMC) type problems related to the reduction of the electromagnetic field in an enclosure with apertrures.