| 有孔箱体屏蔽效能的多模传输线法分析 |
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| 引用本文： | 李永明,郑春旭,郝战铎,刘光明. 有孔箱体屏蔽效能的多模传输线法分析[J]. 重庆大学学报(自然科学版), 2011, 34(10): 27-31 |
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| 作者姓名： | 李永明 郑春旭 郝战铎 刘光明 |
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| 作者单位： | 重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044;重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044;许继电源有限公司,河南许昌461000;辽宁蒲石河抽水蓄能有限公司,辽宁丹东118216 |
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| 基金项目： | 国家自然科学基金资助项目(50877081) ; 重庆市自然科学基金资助项目(CSTC2008BB2311) |
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| 摘 要： | 通过对有孔箱体屏蔽效能的传输线解析计算法进行扩展，得到可计及箱体内高次模传输的多模传输线模型，运用三维电磁场仿真软件HFSS(high frequency structure simulator)进行了有效性验证。应用得到的多模传输线模型，分析了箱体内不同位置处高次模对屏蔽效能的影响。计算结果表明：宽频域上，高次模对屏蔽效能的影响不可忽略；在1 GHz以下，越靠近箱体的开孔，高次模影响越大；在近孔处，高次模会引起某些频段上屏蔽效能的提升。因此，只有综合考虑多种传输模式才能准确反应宽频域上和近孔处的屏蔽效能。
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| 关 键 词： | 传输线 多模 孔缝 屏蔽效能 箱体 |
Analysis of a multimode transmission line model of the shielding effectiveness of enclosures with apertures |
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| LI Yong ming,ZHENG Chun xu,HAO Zhan duo and LIU Guang ming. Analysis of a multimode transmission line model of the shielding effectiveness of enclosures with apertures[J]. Journal of Chongqing University(Natural Science Edition), 2011, 34(10): 27-31 |
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| Authors: | LI Yong ming ZHENG Chun xu HAO Zhan duo LIU Guang ming |
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| Affiliation: | State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044,P. R. China;State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044,P. R. China;Xuji Power Co.Ltd., Xuchang 461000,Henan, P. R. China;Liaoning Pushihe Pumped Storage Co.Ltd., Dandong 118216, Liaoning, P. R. China |
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| Abstract: | The equivalent transmission line method is extended to multi-transverse electric modes of cavity which are introduced by aperture coupling, and it is used to analyze the shielding effectiveness of rectangular enclosures with apertures. The multimode transmission line method is verified by HFSS(High Frequency Structure Simulator). The results show that higher-order mode is essential to obtain an accurate shielding effectiveness of rectangular enclosure on wide frequency domain. Below the frequency of 1 GHz, nearer to the slot, the impact of higher-order mode on the shielding effectiveness is greater in the place mear the slot. Higher-order mode leads to a better shielding effectiveness. |
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| Keywords: | transmission line multimode apertures shielding effectiveness enclosures |
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