非等边三面角反射器RCS的解析表达与有效散射区域分析

An Analytic Representation of the Scalene Trihedral Corner Reflector's RCS and Analysis of Effective Scattering Zone

目前,标准的等边三面角反射器的RCS解析计算方法已经比较成熟,但在实际应用中常常需要处理非标准的、非等边的三面角反射器结构,但相关的解析方法研究并不多见。本文针对非等边三角板型三面角反射器,基于几何光学原理,确定了对目标后向RCS具有实际贡献的等效投影区域,得到了等效散射面积的解析表达形式,从而获得了RCS计算公式;并进一步分析了三面角反射器三个板面上的有效散射区域,以及不同位置对目标RCS贡献的重要程度。本文的方法与结果对复杂目标三面角结构几何特征提取和三面角反射器的改进设计等具有指导意义。

At present,the RCS analytical calculation method of standard equilateral trihedral reflector is quite mature,but in practical application,it is often necessary to deal with non-standard and scalene trihedral reflector structure,but the relevant analytical methods are seldom studied. Based Geometrical Optics theory,we derived a RCS formula for scalene trihedral corner reflector,after we determine the equivalent projection zone which gives contribution to target’s RCS,and give the projection area’s analytic representation. We also analyze the effective scattering zone in each plate of the trihedral corner reflector and the weightiness of different scattering position on surface of each plate. The method and analysis results can be useful for feature extraction of complex target and design of new type of trihedral corner reflectors.