谐振区自旋目标微多普勒效应研究

Micro-Doppler Characteristic of Spinning Target in Resonance Zone

微多普勒模型建立在散射中心假设基础上,将目标抽象为散射点集,适用范围局限于光学区电磁散射。文中针对谐振区目标微多普勒效应进行研究,利用电磁散射方法对典型几何体的微多普勒进行仿真计算,模拟了典型散射体在典型运动模式下的微多普勒瞬时频谱分布,发现瞬时微多普勒呈现一定频谱分布,与光学区的微多普勒特征呈现本质区别。

The micro-Doppler theory is provided to indicate the modulation effect of micro-motion on radar illumination. Based on scattering center approximation, micro-Doppler model regards radar target as a collection of scattering points consequently con- fined to electromagnetic （EM） scattering in optical zone. In this article, the micro-Doppler effect in resonance zone is focused on, and the typical geometry is calculated based on EM scattering method. The result shows that the instantaneous micro-Doppler in resonance zone follows a distribution of spectrum, quite different from that in optical zone.