电磁脉冲与腔体孔缝耦合多峰共振特性研究  

Investigation on Multi- Peak Resonant Electromagnetic Pulse Coupling into the Cavity with a Narrow Slot

作　　者：倪勤[1] 魏志勇[1] 强鹏[1] 方美华[1] 王静[1] 张紫霞[1] 

机构地区：[1]南京航空航天大学航天学院,南京210016

出　　处：《核电子学与探测技术》2014年第7期855-860,865,共7页Nuclear Electronics & Detection Technology

基　　金：中央高校基本科研业务费专项资(NS2012070);江苏省科技计划项目(BE2011833)资助

摘　　要：利用有限积分法对电磁脉冲与腔体孔缝耦合特性进行了研究。选取窄缝为mm量级微小孔缝作为研究对象,借助耦合函数,在矩形多峰共振公式的基础上,分析了正方形环形孔缝共振频率点,同时开展了不同腔体尺寸、缝隙位置和缝隙组合对耦合特性影响的研究。结果表明:正方形环形孔缝多峰共振频率点取决于垂直入射电场的窄缝长边尺寸,所得多峰共振频率点的解析计算值和仿真计算值基本一致,相对误差在5%以内;耦合进入腔体的电场强度由腔体和孔缝尺寸共同决定,窄缝附近存在明显的场增强效应,发生了强烈共振,狭缝处电场幅值高达入射脉冲的60倍。Coupling processes of electromagnetic pulse into cavities with slot are investigated by finite integral method （ FIT） .,Selecting slots with dimension of several millimeters as research object.By coupling function, this paper analyses the square slot resonance frequency based on multi-peak resonance formula.At the same time, coupling effects by the different cavity size,slot position,the slot combination are analyzed.It is found that a square slot multi-peak resonant frequency point depends on the dimensions of the slot of the vertical in-cident electric field,and the theory expression matches the simulation results well with relative deviation below 5%.Electric field intensity in the cavity is determined not only by cavity dimension,but also by the slot dimen-sion,a strong resonance occurs at the slot where the coupling coefficient is maximum,and the electric field am-plitude is 60 times as high as the incident pulse.

关 键 词：电磁脉冲 多峰共振 耦合系数 窄缝 

分 类 号：TN01[电子电信—物理电子学]