摘要
本文叙述了以太阳为信标,用射电天文法测量天线立体方向性图的基本原理和方法。该测量方法用总功率辐射计作为接收系统,用计算机作为终端数据采集和归算系统。它能实时、快速处理,得到天线立体方向性图。被测天线口面直径为20m,波长为17.8cm,可测旁瓣电平约为—41dB,精度约为±0.6dB。
The fundamental principles and techniques of radioastronomical method by using the sun in the measurement of antenna three-dimensional pattern are described. And a total radiometer is used for measurement system. Collection and calculation of the data are performed,by the computer. The aperture and operating wavelength of the measured antenna are respectively 20m and 17.8cm. Measured level is estimated to be -41dB, and measured error is about ±0.6dB.
关键词
立体方向性图
射电天文
辐射计
天线
Three-dimensional pattern, Radioastronomical method, Radiometer
