电磁相似性在计算基本散射体RCS方面的应用

从基本散射体散射特性的普适表达式出发,分析其中各参数单独变化时RCS的变化规律.这不仅使散射体RCS的模型测量结果经相似性关系缩放后能得到原型散射体的RCS,同时对于因工作条件限制而使理想缩比条件不满足时也能计算出原型值.后者为散射体频率特性曲线的外推奠定了理论基础,也为RCS缩比测量设备的频率扩展提供了新的方法和途径.

The Application of Electromagnetic Similarity in the Calculation of RCS of the Basic Scatterer

With the general expression for an arbitrarily simple-shaped scatterer's scattering characteristics as a starting point, the RCS varieties during the respective change of each parameter are analyzed. By these we can get the RCS of the prototype scatterer not only after the scaling of the RCS values in model measurement by means of the similarities, but also when the ideal scaling relation are not satisfied because of the limitation of experimental conditions. The latter result has established an academic basis for the extrapolation of the scattering frequency characteristic curves, and provided a new approach to the frequency range expansion of the RCS scaling measurement equipments.