A Resonance Prediction Method for a Shielding Enclosure with Apertures Illuminated by a Plane Wave

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 ob...

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Bibliographic Details
Published in:Applied Computational Electromagnetics Society journal 2018-11, Vol.33 (11), p.1286
Main Authors: Bao-Lin, Nie, Cao, Zhong, Ping-An, Du
Format: Article
Language:English
Subjects:
Aluminum
Apertures
Approximation
Arrays
Electric fields
Electromagnetism
Enclosures
Geometry
Magnetic properties
Methods
Numerical analysis
Numerical methods
Plane waves
Propagation
Resonant frequencies
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Summary: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.
ISSN:1054-4887
1943-5711