A hybrid algorithm method for calculating electromagnetic shielding effectiveness of apertured enclosure with an arbitrary inner window

Abstract

A hybrid algorithm method for predicting the shielding effectiveness (SE) of apertured enclosure with an arbitrary inner window was proposed. By applying the concept of electromagnetic topology, equivalent circuit models of the enclosures are derived. The equivalent impedance of the arbitrary inner windows are calculated by a full-wave method. Then, the shielding effectiveness can be obtained using the extended BLT equation. Compared with full wave numerical simulation, the proposed method can reduce the computation time from 1000 seconds to 100 seconds while maintaining a very close accuracy.