Study on Coupling Characteristics of Electromagnetic Wave Penetrating Metallic Enclosure with Rectangular Aperture
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Study on Coupling Characteristics of Electromagnetic Wave Penetrating Metallic Enclosure with Rectangular ApertureAbstract
The coupling characteristics of the electromagnetic wave penetrating the metallic enclosure with a rectangular aperture are studied using the hybrid approach which applies the mode-matching technique and the mixed potential integral equation based on the method of moments. The aperture thickness, the polarization direction of incident wave, and high-order modes are all considered in the simulation. The calculated electric field at the centre of the enclosure is compared with data obtained by measurement and other numerical techniques to validate the accuracy and the efficiency of the proposed approach. The electric field distributions inside the metallic enclosure are also presented. Furthermore, this approach is extended to account for the effects of narrow aperture thicknesses and polarization directions. The results demonstrate that the electric field is enhanced around the aperture at the resonant frequency and the coupling electric field amplitude at the center point of the enclosure is also higher than that in the ambient area. It is also noted that the variation of the narrow aperture thicknesses and the different polarization directions act on the coupling characteristics significantly.
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