An Efficient and Reliable Shielding Effectiveness Evaluation of a Rectangular Enclosure With Numerous Apertures

An efficient analytical and accurate model to predict the shielding effectiveness of a rectangular enclosure with numerous small apertures is presented. In this paper, an appropriate equivalent admittance for the perforated side is suggested amid the free space and the enclosure, utilizing the traditional waveguide circuit model where the enclosure is represented by a short-circuited rectangular waveguide. The simulation results of this model are in better agreement with measurements than that of the original waveguide equivalent circuit model. This method is applicable to an array of square and circular holes of staggered and square configurations.