An Extended Hybrid Analytical Model for Shielding Effectiveness Prediction of Multi-Cavity Structure With Numerous Apertures

Abstract

In this paper, we extend our previously published hybrid analytical model which is for the estimation of shielding effectiveness of a dual-cavity structure with an aperture array to generalize the model for a wider range of applications. In the proposed model, the aperture array in the center, off-center, higher-order modes, and multi-cavity structure are taken into consideration, respectively. At last, a comparison of the results calculated by the extended hybrid analytical model with those obtained by the simulation software CST is given. The results show that the extended hybrid analytical model for the shielding effectiveness prediction of a three-cavity structure with numerous apertures has a higher precision and a higher efficiency.

On Symmetry and Asymmetry in Nested Electromagnetic Shields

“…At resonance frequencies, the shielding quality can be compromised by the presence of electromagnetic coupling between the nested shields. Thus, in [35] the authors show that when a resonance is excited in one of several coupled shielding enclosures, the SE of the other enclosure can be reduced by almost 50 dB. In [36], the authors show that the frequency dependence of the voltage induced on a microstrip transmission line located inside nested enclosures has multiple maximums corresponding to the resonant frequencies of both enclosures.…”