| 孔缝箱体屏蔽效能电磁拓扑分析模型 |
| |
| 引用本文： | 张亚普,达新宇,谢铁城.孔缝箱体屏蔽效能电磁拓扑分析模型[J].强激光与粒子束,2014,26(2):023204-239. |
| |
| 作者姓名： | 张亚普 达新宇 谢铁城 |
| |
| 作者单位： | 1.空军工程大学 信息与导航学院, 西安 71 0077 |
| |
| 基金项目： | 国家自然科学基金项目(61271250) |
| |
| 摘 要： | 基于Robinson等效电路法,提出了一种电磁拓扑模型,用于任意平面波入射条件下的孔缝箱体屏蔽效能分析。该模型将孔缝及其所在平面等效为连接自由空间(等效为特性阻抗为Z0的传输线)和剩余箱体(等效为特性阻抗为Zg的短路矩形波导)的二端口网络,并通过等效电路模型计算了该二端口网络的散射矩阵,进而推导出描述孔缝耦合的广义BLT(Baum-Liu-Tesche)方程。设计了4组实验模型用于电磁拓扑理论(EMT)算法、Robinson算法和CST软件的对比分析,仿真结果证明:EMT算法较Robinson算法具有更高的准确率,尤其是在高频域;EMT算法继承了Robinson算法简洁高效的特性,且能直观反映箱体参数、孔逢参数对屏蔽系数的影响,较CST软件实用性更强。
|
| 关 键 词： | 电磁拓扑理论 BLT方程 屏蔽系数 电磁耦合 传输线 |
| 收稿时间： | 2013-06-06; |
Electromagnetic topology model for shielding effectiveness estimation of metallic enclosure with apertures |
| |
| Zhang Yapu,Da Xinyu,Xie Tiecheng.Electromagnetic topology model for shielding effectiveness estimation of metallic enclosure with apertures[J].High Power Laser and Particle Beams,2014,26(2):023204-239. |
| |
| Authors: | Zhang Yapu Da Xinyu Xie Tiecheng |
| |
| Affiliation: | 1.Information and Navigation College,Air Force Engineering University,Xi'an 710077,China |
| |
| Abstract: | This paper presents an electromagnetic topology model for shielding effectiveness estimation, considering oblique incidence and polarization, based on Robinson equivalent circuit theory. In this model, the apertures are represented by a two-port network, which connects the free space (represented by a transmission line with characteristic impedance Z0) and the enclosure (represented by a short circuited length of rectangular waveguide). The aperture scattering matrix is deduced by equivalent circuit model, based on which a new generalized BLT equation for aperture coupling is proposed. Four test models are designed for the comparison of the EMT algorithm, Robinson algorithm and CST. The simulation result shows that, the EMT algorithm is more accurate than the Robinson algorithm, especially in the high frequency domain; while it is as concise as the Robinson algorithm, and establishes the relationship between shielding effectiveness and parameters of enclosure and apertures, which makes it more practical than CST. |
| |
| Keywords: | Baum-Liu-Tesche equation shielding effectiveness electromagnetic coupling transmission line |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《强激光与粒子束》浏览原始摘要信息 |
|
点击此处可从《强激光与粒子束》下载全文 |
|
