金属腔体不同耦合途径对腔内电磁耦合的影响

发布时间：2018-03-10 17:03

  本文选题：金属腔体　切入点：不同耦合途径　出处：《高电压技术》2016年05期 　论文类型：期刊论文

【摘要】：为研究金属腔体不同耦合途径对腔内电磁耦合的影响,基于时域有限积分方法建立了电磁波辐射条件下金属腔体不同耦合途径计算模型,引入不同耦合途径对比系数评价指标,分析了孔缝、贯通导线两种耦合途径对腔内电磁耦合的影响,采用吉赫兹横电磁波(GTEM)室、矢量网络分析仪等搭建了一种新的耦合试验平台对计算结果进行验证。研究表明:该试验方法准确性好;腔内电磁耦合受孔缝、贯通导线共同作用,开孔腔体加载短贯通导线时腔内耦合主要受腔体谐振影响,加载长贯通导线腔内耦合还受到贯通导线自身谐振影响;频率在153 MHZ以下时贯通导线为主要耦合途径;高频时,若开孔尺寸远大于贯通孔尺寸,腔体谐振频率附近贯通导线为主要耦合,贯通导线自身谐振频率附近贯通导线也为主要耦合途径,其他频点处孔缝为主要耦合途径。
[Abstract]:In order to study the influence of different coupling paths of metal cavity on electromagnetic coupling in cavity, a computational model of different coupling paths for metal cavity under electromagnetic wave radiation is established based on the finite integral time domain method, and the comparison coefficient evaluation index of different coupling paths is introduced. In this paper, the influence of two kinds of coupling ways, aperture and traverse, on the electromagnetic coupling in the cavity is analyzed. The GTEM chamber is used in the Ghertz transverse electromagnetic wave chamber. A new coupling test platform has been set up to verify the calculation results. The results show that the accuracy of the test method is good, and the electromagnetic coupling in the cavity is subjected to the joint action of holes and traverse. The intracavity coupling is mainly affected by cavity resonance when the cavity is loaded with a short perforated conductor, and the coupling within the cavity is also affected by its own resonance when the frequency is less than 153 MHZ, and at high frequency, when the frequency is less than 153 MHZ, the internal coupling is mainly affected by the cavity resonance, and at high frequency, when the frequency is less than 153 MHZ, If the size of the open hole is much larger than the size of the perforated hole, the main coupling is near the resonant frequency of the cavity, the main coupling path is the through wire near the resonant frequency of the penetrating conductor itself, and the main coupling path is the hole slit at other frequency points.
【作者单位】： 电子信息系统复杂电磁环境效应国家重点实验室;军械工程学院静电与电磁防护研究所;
【基金】：973项目(613138) 预研项目(51333030101) 国家自然科学基金(61372040)~~
【分类号】：TN03
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本文编号：1594255