电工技术学报  2018, Vol. 33 Issue (15): 3651-3660    DOI: 10.19595/j.cnki.1000-6753.tces.171086
电工理论与新技术 |
任意平面波辐照下开孔矩形腔体屏蔽效能快速计算方法
胡溥宇, 赵昱, 杨锦鹏, 孙晓颖
吉林大学通信工程学院 长春 130000
A Fast Approach for Calculating the Shielding Effectiveness of Rectangular Enclosures with Apertures under Oblique Plane Wave Illuminations
Hu Puyu, Zhao Yu, Yang Jinpeng, Sun Xiaoying
Department of Communication Engineering Jilin University Changchun 130000 China
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摘要 提出了一种开孔矩形腔体电场耦合计算模型,能够在宽频带内快速可靠地计算任意平面波辐照下腔体内任意位置处的屏蔽效能。模型将开孔等效为双导体微带传输线,腔体视为终端短路的波导,通过场路耦合模型计算腔体内部等效电压,并应用波导理论计算腔体耦合电场的TEmn与TMmn模式。相比于现有计算模型,本模型全面研究了入射波仰角、方位角、极化角对屏蔽效能的影响,同时考虑腔内电场高次模式,可在宽频带范围内,对任意开孔位置、腔内任意观察点处的屏蔽效能进行快速有效的计算。通过仿真与传输线矩阵法对比,计算结果在0.5~3 GHz频带内符合度较好,验证了所建立模型的有效性与准确度。
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胡溥宇
赵昱
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孙晓颖
关键词 电磁屏蔽矩形腔体屏蔽效能电路模型    
Abstract:This paper presents a model for calculating the electric field coupling in a rectangular enclosure with apertures, which is capable of predicting the shielding effectiveness in any position of the enclosure under oblique plane wave illumination fast and accurately. In this model, the aperture is represented by double coplanar strip transmission lines, and the enclosure is represented by a rectangular waveguide shorted at the end. The equivalent voltage inside the enclosure is obtained by field-circuit coupled model, then the TEmn and TMmn mode of the coupling electric field inside the enclosure are calculated based on waveguide theory. Compared with the existing equivalent circuit analytical models, the effects of the elevation angle, azimuth angle and polarization angles on the shielding effectiveness are taken into account comprehensively in this model, as well as the higher order modes . Besides, the presented model can calculate the shielding effectiveness fast and efficiently with arbitrarily positioned apertures and monitor point within enclosure over a wide frequency range. Results of the proposed model are in good agreement with that of CST simulation using transmission line matrix method within the frequency range of 0.5~3 GHz. Thus the effectiveness of the model has been validated.
Key wordsElectromagnetic shielding    rectangular cavity    shielding effectiveness    circuit model   
收稿日期: 2017-07-25      出版日期: 2018-08-14
PACS: TM15  
基金资助:“十三五”装备预先研究项目资助(30105030302)
通讯作者: 孙晓颖 男,1969年生,教授,博士生导师,研究方向为汽车电磁兼容、无线定位技术及应用。E-mail:sunxy@jlu.edu.cn   
作者简介: 胡溥宇 男,1993年生,博士研究生,研究方向为汽车电磁兼容和电磁脉冲防护技术。E-mail:18643125804@163.com
引用本文:   
胡溥宇, 赵昱, 杨锦鹏, 孙晓颖. 任意平面波辐照下开孔矩形腔体屏蔽效能快速计算方法[J]. 电工技术学报, 2018, 33(15): 3651-3660. Hu Puyu, Zhao Yu, Yang Jinpeng, Sun Xiaoying. A Fast Approach for Calculating the Shielding Effectiveness of Rectangular Enclosures with Apertures under Oblique Plane Wave Illuminations. Transactions of China Electrotechnical Society, 2018, 33(15): 3651-3660.
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