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引言在卫星通信地面站大天线中,大多数天线是按波动条件修正反射面以提高增益和噪声温度特性。本文先简介改进型卡塞格伦天线的双镜系统,用电流法求出副面散射图,接着分析天线计算程序以实现双镜系统的高效率。近年来,我们在每秒百万次655高速数字电子计算机上算出天线主副面的轮廓曲线提供工厂生产,所计算的副面散射图数据与国外杂志基本吻合。关于天线的计算比较复杂,如何以数字近似法解微分方程、积分方程和三角方程已渗透在部分程序中。对于这样一个
INTRODUCTION In large antennas for satellite communications earth stations, most antennas modify the reflecting surface in fluctuating conditions to improve gain and noise temperature characteristics. In this paper, we firstly introduce the double mirror system of the improved Cassegrain antenna, and then find the secondary scattergram by the current method, then analyze the antenna calculation program to realize the high efficiency of the double mirror system. In recent years, we calculated the contour curves of the main and auxiliary antennas on the 655 high-speed digital electronic computers per million times per second to provide the factory production. The calculated data of the secondary scattergrams are in good agreement with the foreign magazines. Calculation of the antenna is more complicated, how to approximate the numerical approximation of differential equations, integral equations and trigonometric equations have infiltrated part of the program. For such a