无人机数据链射频前端高强辐射场干扰效应研究  

Research on interference effect of high intensity radiated field in RF front-end of UAV datalink

作　　者：马振洋[1] 李慕凡 李斌 MA Zhenyang;LI Mufan;LI Bin(Key Laboratory of Civil Aircraft Airworthiness Certification Technology,CAUC,Tianjin 300300,China;Sino-European Institute of Aviation Engineering,CAUC,Tianjin 300300,China;College of Safety Science and Engineering,CAUC,Tianjin 300300,China)

机构地区：[1]中国民航大学民航航空器适航审定技术重点实验室,天津300300 [2]中国民航大学中欧航空工程师学院,天津300300 [3]中国民航大学安全科学与工程学院,天津300300

出　　处：《中国民航大学学报》2024年第5期14-21,共8页Journal of Civil Aviation University of China

基　　金：天津市自然科学基金项目(21JCZDJC00860)。

摘　　要：针对四旋翼无人机(UAV,unmanned aerial vehicle)数据链在低空飞行时易受高强辐射场(HIRF,high intensity radiated field)干扰的问题,本文采用场-路联合仿真的方法对其进行干扰效应的研究。首先,利用电磁仿真软件探究UAV整机模型在HIRF下的天线耦合效应,并对不同辐照方向、信号类型和脉宽系数下的耦合电压进行分析;其次,通过电路设计分析软件对数据链射频(RF,radio frequency)前端电路进行注入仿真并分析干扰效应。结果表明,脉宽系数越小,高斯脉冲造成的干扰越强,相同脉宽系数下的调制高斯脉冲造成的干扰强于高斯脉冲;干扰信号的加入会导致射频前端中频(IF,intermediate frequency)输出信号的峰值显著增大,峰值频率发生偏移以及信噪比降低。Aimming at the datalink of quadrotor unmanned aerial vehicle(UAV)is susceptible to be interferenced by high intensity radiated field(HIRF)in low altitude airspace,this paper proposes a method of field-circuit joint simulation to investigate the interference effect.Firstly the antenna coupling effect of UAV model under HIRF is investigated with electromagnetic simulation software,and the coupling voltages under different irradiation directions,different signal types and different pulse width coefficients are analyzed.Secondly,the radio frequency(RF)front-end circuits of the datalink are integrated into the simulation with circuit design and analysis software to assess the interference effect.The results demonstrate that the smaller the pulse width coefficient,the stronger the interference caused by Gaussian pulses.Additionally,under identical pulse width coefficients,modulated Gaussian pulses induce stronger interference than Gaussian pulses.Moreover,the addition of the interference signal leads to a significant increase in the peak value of the intermediate frequency(IF)output signal of the RF front-end,the shift of the peak frequency and a decrease in signal-to-noise ratio.

关 键 词：高强辐射场(HIRF) 无人机数据链 场-路联合仿真 干扰效应 

分 类 号：V279[航空宇航科学与技术—飞行器设计]