大口面相控阵天线的机体散射效应

Effects of Aircraft Scattering of the Large Aperture Phas ed Array

本文利用一致性几何绕射理论（ＵＴＤ）对装机后大口面相控阵天线辐射方向图的预测进行几何建模，研究并提出了适合该问题的点源模型和叠加模型，分析了天线受机体散射影响后性能的变化，为天线装机后辐射性能预测与布局优化提供了理论依据。

In this paper,a point source model and an addit ive model that is appliable in doping out the patterns of large aperture phased array fixed on an aircraft are presented by the Uniform Geometric Theory of Diff ration(UTD).The variation of the performance of the array under the influence of aircraft scattering is analyzed and some of the calculated results are given fo r the arrangement optimization of antennas.