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

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.