基于TEM喇叭的电磁脉冲辐射天线优化设计  

Optimization design of EMP radiation antenna based on TEM horn

作　　者：周星 芦艺兵 赵敏 王平平 Zhou Xing;Lu Yibing;Zhao Min;Wang Pingping(National Key Laboratory on Electromagnetic Environment Effects,Shijiazhuang Campus,Army Engineering University,Shijiazhuang 050003,China)

机构地区：[1]陆军工程大学石家庄校区电磁环境效应重点实验室,石家庄050003

出　　处：《强激光与粒子束》2024年第4期89-95,共7页High Power Laser and Particle Beams

基　　金：国防基础科研计划项目(JCKYS2023DC03)。

摘　　要：针对TEM喇叭天线终端反射大、低频辐射效率低的问题,对其进行了仿真优化设计。采用时域分析方法,分析了端部加载电阻与背部加载电阻的低频补偿方法,对TEM喇叭天线的尺寸、极板顶角等结构参数进行了优化,采用末端卷边结构,提升了辐射场的峰值场强与脉宽。根据仿真优化结果,研制了长度2.5 m、天线极板间张角45°、天线极板顶角45°的TEM喇叭天线,通过实测验证了仿真结果。结果表明,加载电阻可以有效降低反射,背部加载电阻方式的峰值场强和脉宽比端部加载电阻高,且采用4个电阻并联加载的效果较好;适当增加天线长度、极板顶角以及极板间夹角可以提高天线辐射性能。该研究结果为TEM喇叭天线在辐射式核电磁脉冲试验系统的应用提供了参考。Aiming at the problem of high reflection and poor low-frequency radiation performance of TEM horn antenna,the simulation optimization design is carried out.The low frequency compensation methods of end loading resistance and back loading resistance are analyzed by using time domain analysis method,and the structural parameters such as the size of the TEM horn antenna and the apex angle of the plate are optimized.The peak field strength and pulse width of the radiation field are improved by using the end crimping structure.According to the simulation results,TEM horn antenna with length of 2.5 m,the included angle of the plates of 45°and antenna plate apex angle of 45°is developed.The simulation results are verified by the measurement of the new antenna.The results show that the loading resistance can effectively reduce the reflection,and the peak field strength and pulse width of the back loading resistance are higher than that of the end loading resistance,and the effect of 4 resistors in parallel loading is better.The radiation performance of the antenna can be improved by appropriately increasing the antenna length,the apex angle of the plate and the included angle between two plates.The research results provide a reference for the application of TEM horn antenna in the radiation nuclear electromagnetic pulse test system.

关 键 词：TEM喇叭天线 核电磁脉冲 天线尺寸优化 加载电阻 天线结构优化 

分 类 号：TN822.8[电子电信—信息与通信工程]