Chen Kaibai, Liu Shaohua, Gao Min, Zhou Xiaodong
Department of Missile Engineering, Army Engineering University, Shijiazhuang 050003, China.
Beijing Institute of Systems Engineering and Information Control, Beijing 100020, China.
Sensors (Basel). 2022 Jun 20;22(12):4641. doi: 10.3390/s22124641.
An ultra-wideband electromagnetic pulse (UWB EMP) can be coupled to an FMCW system through metal wires, causing electronic equipment disturbance or damage. In this paper, a hybrid model is proposed to carry out the interference analysis of UWB EMP coupling responses on the wires to the FMCW radar. First, a field simulation model of the radar is constructed and the wire coupling responses are calculated. Then, the responses are injected into an FMCW circuit model via data format modification. Finally, we use the FFT transform to identify the spectral peak of the intermediate frequency (IF) output signal, which corresponds to the radar's detection range. The simulation results show that the type of metal wire has the greatest influence on the amplitude of coupling responses. The spectral peak of the IF output changes to the wrong frequency with the increase of injection power. Applying interference at the end of the circuit can more effectively interfere with the detection of the radar. The investigation provides a theoretical basis for the electromagnetic protection design of the radar.
超宽带电磁脉冲（UWB EMP）可通过金属线耦合到调频连续波（FMCW）系统，从而导致电子设备受到干扰或损坏。本文提出了一种混合模型，用于对UWB EMP在导线上的耦合响应与FMCW雷达之间进行干扰分析。首先，构建雷达的场仿真模型并计算导线耦合响应。然后，通过数据格式修改将响应注入到FMCW电路模型中。最后，利用快速傅里叶变换（FFT）识别中频（IF）输出信号的频谱峰值，该峰值对应于雷达的探测范围。仿真结果表明，金属线的类型对耦合响应的幅度影响最大。随着注入功率的增加，IF输出的频谱峰值会出现频率偏移。在电路末端施加干扰能更有效地干扰雷达的探测。该研究为雷达的电磁防护设计提供了理论依据。
