斜入射HEMP近地面电磁环境特性研究  

A Study on Near-surface Electromagnetic Environment Characteristics of HEMP with Oblique Incidence

作　　者：柴焱杰[1] 孙继银[1] 李承剑[1] 孙东阳[2] 

机构地区：[1]第二炮兵工程学院四系,西安710025 [2]西北核技术研究所第三研究室,西安710024

出　　处：《现代雷达》2011年第8期76-80,共5页Modern Radar

基　　金：学院科研创新基金资助项目

摘　　要：高空核爆电磁脉冲(HEMP)具有覆盖范围广、峰值场强高等特点,对电子设备构成严重的威胁。针对有关HEMP标准中主要涉及自由空间HEMP波形描述的情况,使用时域有限差分法研究了HEMP平面波斜入射地面时近地面的电磁脉冲环境特性,计算了HEMP在地面附近的电磁环境参数。结果表明,垂直极化的HEMP平面波,随着入射角的增大,地面附近的水平场幅值变小、脉冲宽度变窄,垂直场则相反;水平极化的HEMP平面波,随着入射角的改变,较低位置处比较高位置处的总场变化更为明显。High-altitude electromagnetic pulse（HEMP） has the characteristics of a wide coverage and high peak field strength,which poses a serious threat to the electronic devices.But the current HEMP standards include only the general wave characteristics in the free space,so the electromagnetic environmental characteristics near the ground induced by the HEMP incident plane wave oblique to the ground are studied in the paper,and the electromagnetic environmental parameters are calculated.The results show that,in the case of vertical polarization plane wave,the amplitude of horizontal field becomes smaller and pulse width becomes narrower when the incidence angle increases,but the ones of vertical field are just the opposite,and in the case of horizontal polarization plane wave,it is found that the changes of total-field characteristics in the lower position are more prominent than the ones in the higher position with the incidence angle changes.

关 键 词：高空核爆电磁脉冲 斜入射 时域有限差分法 电磁环境 

分 类 号：TN011[电子电信—物理电子学]