导电板覆盖的开孔矩形腔体电磁屏蔽效能的比较研究

发布时间：2018-05-13 20:57

本文选题：电磁屏蔽 + 屏蔽效能　；参考：《电工技术学报》2016年01期

【摘要】：针对导电板覆盖的开孔矩形腔体,比较了SE_i、SE_a、SE_m3种屏蔽效能(SE_i为入射场与开孔覆盖导电板时腔体内部某位置的透射场场强大小的比值,SE_a为开孔敞开与开孔覆盖导电板时腔体内部同一位置的透射场场强大小的比值,SE_m为开孔覆盖参考导电板与开孔覆盖待测导电板时腔体内部同一位置的透射场场强大小的比值)。利用解析理论方法和全波仿真方法计算分析了腔体谐振和观测点位置对3种屏蔽效能的影响规律,两种方法的计算结果一致性良好。结果表明,SE_i受这两个因素的影响很明显,SE_a受到的影响相对较小,而SE_m几乎没有受到影响,且SE_m与一个无限大板相对于另一个无限大板的屏蔽效能近似相等,这一特性使其在材料电磁屏蔽效能的评估中有着潜在的应用价值。
[Abstract]:For a rectangular cavity with an open hole covered with a conductive plate, In this paper, we compare the shielding effectiveness of SEI / SES / SEM ~ 3 with the ratio of the intensity of the transmission field in a certain position of the cavity when the incident field and the hole are covered with the conducting plate, and the intensity of the transmission field of the cavity at the same position when the hole is open and the hole is covered with the conducting plate. The ratio of the size of SEM is the ratio of the intensity of the transmission field in the same position inside the cavity when the reference conductive plate is covered with an open hole and the conductive plate is covered with an open hole. The influence of cavity resonance and observation point position on the shielding effectiveness is analyzed by using analytical theory method and full-wave simulation method. The calculated results of the two methods are in good agreement with each other. The results show that the effects of these two factors on the SE_m are obviously relatively small, while the SE_m is almost unaffected, and the shielding effectiveness of one infinite plate is approximately equal to that of the other infinite plate. Because of this property, it has potential application value in the evaluation of electromagnetic shielding effectiveness of materials.
【作者单位】：新能源电力系统国家重点实验室(华北电力大学);
【基金】：国家自然科学基金项目(51307055) 国家电网公司项目(SGRI-WD-71-12-009)资助
【分类号】：TN03

【相似文献】