车载超短波天线HEMP耦合特性模拟研究  

Simulation of HEMP Coupling Characteristics of Vehicle VHF Antenna

作　　者：赵玮 诸雪征 毛从光 ZHAO Wei;ZHU Xue-zheng;MAO Cong-guang(Institute of NBC Defense,Beijing 102205,China;Institute of Nuclear Technology,Xi’an 710024,China)

机构地区：[1]陆军防化学院,北京102205 [2]西北核技术研究院,西安710024

出　　处：《核电子学与探测技术》2020年第1期87-93,共7页Nuclear Electronics & Detection Technology

摘　　要：为了研究车载天线在高空核电磁脉冲(HEMP)环境中的耦合特性,结合时域有限差分方法(FDTD)的细线算法与同轴馈源电路参数模型,计算车载超短波天线的末端响应,并分析天线长度、入射角度、不同的天线布局与馈电方式等对天线末端响应量的影响规律.结果表明当入射波与天线之间的有效反射面积增大时,末端电压量也随之增大.同时同轴馈电相较于中端馈电得到的输入端电流幅值更大,衰减速度也更快.对于斜天线而言,耦合电压的峰值随着入射电场与天线方向夹角的增大而减小,但谐振频率则始终不变.当天线长度增加时,终端电压与谐振频率都随之增加.In order to study the coupling characteristics of vehicle antenna in high altitude nuclear electromagnetic pulse environm ent,the end response of vehicle VHF antenna is calculated by using the thin wire algorithm of finite difference time domain(FD TD)and the coaxial feed model.Based on that,the variation of antenna length and incident angle,different antenna layout and feeding mode are analyzed.The variation of the response at the end of the antenna is studied.The results show that the terminal voltage increases with the increase of the effective reflection area between the incident wave and the antenna.At the same time,the input current amplitude of coaxial feeding is larger and the attenuation speed is faster than that of mid-end feeding.For oblique antenna,the peak value of coupling voltage decreases with the increase of the angle between incident electric field and antenna direction,but the resonant frequency remains unchanged.When the length of antenna increases,the terminal voltage and resonance frequency increase accordingly.

关 键 词：时域有限差分算法 细线算法 超短波天线 高空核电磁脉冲 响应电压 

分 类 号：TN82[电子电信—信息与通信工程]