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本文提出了一种成形的通信卫星天线波束的产生方法。文中部分地推导了并系统地给出了波束成形计算所需的全部数学公式。做为一例,对中国卫星的成形波束进行了实际计算。计算结果是一组最佳子波束馈电系数和一张绘于星心球面地图上的天线增益等值线图。图中-3dB等值线满意地与中国国土(未含南海诸岛)相吻合。
This paper presents a method for generating a shaped satellite antenna beam. The paper deduces and systematically gives all the mathematical formulas required for beamforming calculation. As an example, a practical calculation of the shaped beam of China’s satellite was made. The result is a set of best sub-beam-feed coefficients and an antenna gain contour plotted on a star-spheroidal map. The -3dB contour in the figure satisfactorily matches China’s territory (excluding the South China Sea Islands).