电磁脉冲模拟器前后过渡段锥角设计

 采用矩量法并结合快速多极子方法，对电磁脉冲模拟器内部场波形进行了数值计算，寻找过渡段结构与电磁脉冲波形等的关系，从理论上对模拟器前后过渡段的锥角进行了优化。结果表明：存在前后过渡段的结构都会激起场强沿传播方向的分量；前过渡段主要对工作区域场波形的上升沿产生影响，当前锥角减小时，场波形的上升时间先减小再缓慢增加；后过渡段主要对场波形的衰减部分产生影响，使场波形的衰减部分随着后锥角的增大而产生严重畸变。最终优化设计的电磁脉冲模拟器前过渡段的锥角为15°，后过渡段的锥角为20°，其仿真得到的波形较光滑，没有出现振荡及明显的畸变。

Transitional section cone angle design of EMP simulator

Electric field waveform in the simulator working region was calculated using the moment method and fast multipole method. The relationship between transitional section structure and EMP waveform was studied. And the optimum cone angles of transitional section of EMP simulator were designed. The results indicate that the front and back transitional sections will both evoke the electric field along the transmitting direction. The front transitional section puts influence mainly on the rising time of field waveform in working region. When the front cone angle becomes smaller, the rising time of waveform first decreases and then increases slowly. While the back transitional section puts influence mainly on the decline portion of waveform, it makes decline portion of waveform produce much more