主要研究在高空核爆的双指数类型电磁脉冲平面波入射时,地面附近的电磁脉冲环境.计算给出了在不同入射波状态,不同地表介质电气特性和距地面不同高度等条件下的电磁脉冲环境参数,归纳了一些规律性认识.结果显示:地面附近的电场会随距地面高度的不同而发生显著的变化,对于水平场分量,其反射场总是试图抵消入射场,而对于垂直场分量,其反射场叠加在入射场上,使得地面附近的垂直场强幅值一般大于入射波场强幅值;当入射波仰角增大时,合成电场波形的脉冲宽度会变宽;地表介质的电气特性参数不同也会对地面附近电场的波形和幅值造成一定的影响.

The electromagnetic field above ground produced by an incident highaltitude electromagnetic pulse plane wave striking the ground plane was described in this paper in terms of the Fresnel reflection coefficients and the numerical FFT. The pulse reflected from the ground plane always cancel the incident field for the horizortal field component, but the reflected field adds to the incident for the vertical field component. The results of several cases for variations in the observation height, angle of incidence and lossy ground electrical parameters were also presented showing different efield components above the earth.