天线表面误差的精确计算方法及电性能分析

提出一种天线表面误差的计算方法,用来精确计算变形表面法向、径向及轴向误差,并推导了相应的计算公式.通过分析某工程7.3m圆抛物面天线在多种工况下的表面误差,及其与ANSYS软件计算结果的比较,证明了该方法的正确性,且计算结果仅为ANSYS软件分析结果的三分之一左右.实验结果说明此方法能够更准确地分析变形天线的表面误差及电性能.在工程中应用此方法分析大型空间天线与地面天线,可明显降低天线设计成本,缩短天线设计周期,并为电气设计人员提供准确的天线变形反射面信息.

Precise algorithm for surface errors of reflector antennas and analysis of its electrical performance

A novel precise algorithm for surface errors is submitted, which can be used to accurately evaluate the normal, radial and axial deviations of distorted surface. The corresponding formulae were also deduced. The correctness of the new method with its simulation values only one third of the analysis results of ANSYS software is verified by analyzing the surface errors of a 7.3-m parabolic reflector antenna working under different wind speeds and elevations in experiments and comparing the simulation results of the precise algorithm and ANSYS software methods. The data and figures have demonstrated that the new precise algorithm has the ability to well analyze the surface errors and electrical performances of distorted antenna. Its application in both large space and ground antennas will greatly decrease the design cost and shorten the design period of antenna, also offer electrical designers the accurate distortion information of antenna reflectors.