A Resonance Prediction Method for a Shielding Enclosure with Apertures Illuminated by a Plane Wave
关键词:
Aperture array, electromagnetic shielding, resonances, shielding enclosure摘要
Electromagnetic resonances in a shielding enclosure with apertures could result in significant degradation of its shielding performance. In this paper, an analytical method is proposed to predict the resonances of a shielding enclosure with aperture arrays illuminated by a plane wave. Firstly, an obliquely incident and arbitrarily polarized plane wave is decomposed into several normally incident plane waves each polarized in the axis direction. Then, the transmitted fields through each aperture are equivalent to fields radiated by a magnetic current located at the center of the corresponding aperture. Finally, the resonant modes and resonant frequencies of the enclosure are determined according to the direction of the magnetic current and the properties of the radiated fields. This method is verified by comparing its results with the results of full-wave simulations. Compared with numerical methods, the method is easier to implement and more efficient in predicting resonances.
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参考
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