论文部分内容阅读
为解决传统核电磁脉冲模拟器存在测试空间受限的问题,提出了基于横电磁波(TEM)喇叭天线的高空核电磁脉冲辐射波模拟器设计方案。通过数值仿真验证了TEM喇叭天线的辐射场波形,指出TEM喇叭天线在应用于辐射式电磁脉冲模拟器时存在低频辐射能力差的问题;通过比较TEM喇叭天线对3种典型核电磁脉冲的辐射能力,发现辐射场的上升沿部分主要取决于激励源的上升前沿陡度,辐射场的脉冲宽度与激励脉冲的宽度有关,可以通过展宽激励源脉冲宽度的方法来补偿TEM天线低频辐射能力差的问题;通过实验验证了利用TEM喇叭天线研制电磁脉冲辐射波模拟器的可行性,但仍需要阻性加载或展宽激励脉冲等方法对TEM喇叭天线的低频辐射性能进行改善。
In order to solve the problem of limited test space of traditional nuclear electromagnetic pulse simulator, a design scheme of high-altitude nuclear electromagnetic pulse radiation wave simulator based on transverse electromagnetic wave (TEM) horn antenna was proposed. The radiation field waveform of TEM horn antenna is verified by numerical simulation. It is pointed out that TEM horn antenna has poor low-frequency radiation ability when applied to radiant electromagnetic pulse simulator. By comparing TEM horn antenna’s radiation ability to three kinds of typical nuclear pulse, It is found that the rising edge of the radiation field mainly depends on the rising steepness of the excitation source. The pulse width of the radiation field is related to the width of the excitation pulse. The problem of poor low-frequency radiation capability of the TEM antenna can be compensated by widening the excitation pulse width The feasibility of using the TEM horn antenna to develop the electromagnetic pulsed radiation simulator is verified by experiments. However, the low-frequency radiation performance of the TEM horn antenna is still required to be improved by resistive loading or broadened excitation pulse.