Analysis of the Effect of Aperture Coupling on Enclosure Shielding Effectiveness

Shielding enclosure can effectively improve the ability of internal electronic equipment to resist external electromagnetic interference. Generally shielding effectiveness (SE) is used to judge the shielding performance of the enclosure against external electromagnetic waves. This paper aims at analysing the influence of aperture coupling on enclosure SE for the purpose of accurately predicting the SE of enclosure with different apertures. The relationship between the scale factor of SE and the spacing and number of apertures in TE 101 mode is deduced. The findings in the paper have important theoretical and practical significance for the industrialization designs of shielding enclosure.