Aimming at the datalink of quadrotor unmanned aerial vehicle(UAV)is susceptible to be interferenced by high in-tensity 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 cir-cuits of the datalink are integrated into the simulation with circuit design and analysis software to assess the inter-ference 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 in-duce stronger interference than Gaussian pulses.Moreover,the addition of the interference signal leads to a signifi-cant 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
Key words
high intensity radiated field(HIRF)/unmanned aerial vehicle(UAV)datalink/field-circuit joint simulation/interference effect
维普
万方数据