This study presents the micro-Doppler signature (MDS) of small drones based on resonance phenomena. The MDS analysis of a drone is conducted for various detection conditions. The Doppler frequencies due to the rotation of rotor blades, characterized by different materials and dimensions, are extracted at specific angular frequencies. It is confirmed that the resonance phenomenon caused by the copper-coated conducting rotor blade significantly affects the Doppler frequency. As the rotor blade dimension increases, the resonance effect moves to a lower frequency band. It is interesting to note that the resonance effect of horizontal to horizontal (HH) polarization occurs in a lower frequency band compared to vertical to vertical (VV) polarization. Additionally, it is performed in a monostatic and bistatic radar environment to analyze the resonance effect. The theoretical analysis based on full-wave simulation is confirmed via measurements with frequency-modulation continuous wave (FMCW) radar.

这项研究展示了基于共振现象的小型无人机的微多普勒特征 (MDS)。无人机的 MDS 分析是针对各种检测条件进行的。由于转子叶片的旋转，以不同材料和尺寸为特征的多普勒频率在特定角频率下被提取。经证实，由镀铜导电转子叶片引起的共振现象显着影响多普勒频率。随着转子叶片尺寸的增加，共振效应移动到较低的频带。有趣的是，与垂直到垂直 (VV) 极化相比，水平到水平 (HH) 极化的共振效应发生在较低的频带中。此外，它在单基地和双基地雷达环境中执行，以分析共振效应。通过调频连续波（FMCW）雷达的测量证实了基于全波仿真的理论分析。