Analyzing electromagnetic shielding of perforated screens

The paper proposes a method for the analysis of electromagnetic shielding in the case of perforated screens. The screen is modeled by an electric circuit on which loop analysis is performed. The equations coefficients are obtained from the resistances, self-inductances and mutual inductances of the screen sectors. These parameters are determined by integration, assuming a simplified model for the distribution of the magnetic potential and the current density. In order to minimize the computational error, the integration expressions are selected based on the distance between the screen sectors. A two-dimensional field computational model is employed.