天线-罩系统的分析

本文利用平面波谱概念,经恰当地选取离散抽样点,通过数值算法比较全面地分析了罩对天线方向图的影响,除常规的视轴误差分析之外,着重计算了交叉耦合场和由罩壁反射引起的天线远场方向图中的闪烁瓣,并讨论了这些影响随天线扫描角的变化规律。

ANALYSIS OF ANTENNA-RADOWI SYSTEMS

The conventional two-dimensional ray-tracing technique is a classical method for analysis of antenna-radom systems. How-ever, in point of detail treatment for field distortions introduced by the radom using above technique, the accuracy is usually uncertain due to the inherent errors associated with the ray-tracing approximation of the antenna near field.A very effectivy approach based on sampling theorem using plane wave spectrum （PWS） method is given in this paper, the effects of airborne radome on antenna radiation pattern are analysed from many aspects. Besides the analysis of regul arapparent boresigh error. Stress is put on the calculations of radom cross-polarization fields and sidelobes （flash lobe） induced by the reflection on inner surface of radom. A number of useful curves of every variation is shown and the varying regulations with respect to antenna scanning angle are also discussed.