复杂电磁环境下无人机的雷达散射特性研究进展

Research progress on the radar cross section of the UAV in the complex electromagnetic environments

雷达散射截面(RCS)是雷达隐身技术中最为关键的概念之一,它表征了目标在雷达波照射下所产生的回波强度。无人机在复杂电磁环境下具有“小(低RCS)、慢(速度慢)、低(低飞)”的特点,而且受地理因素、气象因素和非合作雷达辐射源等干扰的影响显著。针对以上特点,给出了在复杂电磁环境的无人机的RCS特征及对雷达回波特性的影响,介绍了各种复杂电磁环境下无人机的RCS的研究进展。

The radar scattering cross(RCS)which represents the echo strength of the target under the incidence wave is one of the most important concepts in the radar stealth.With the characteristics of small(low RCS),slow(low flight speed)and low(low flight height),the RCS of the unmanned aerial vehicle(UAV)in complex electromagnetic environments are affected by the geography,meteorology,non-cooperative radar radiation source and so on.Based upon such conditions,the RCS of the UAV in the complex electromagnetic environments and the influence of the radar echo are presented in this paper.Meanwhile,the research progress on the RCS of the UAV in the complex electromagnetic environments are introduced.