４．天线系统的馈源 馈源由馈电波导、极化器和高频头组成，它相当一个初级接收（辐射）器，能把聚焦在天线焦点上微弱的卫星下行信号接收下来，进行极性选择、放大、变频，然后输出中频信号，输入到卫星接收机。 （１）一体化馈源 馈电波导要求准确地放在天线的聚焦点上，这样 4. The feed system of the antenna system consists of a feeder waveguide, a polarizer and a tuner. It acts as a primary receiver (radiator) that receives the weak satellite downlink signal focused on the antenna focus for polarity selection , Amplification, frequency conversion, and then output IF signal, input to the satellite receiver. (1) The integrated feed-feed waveguide requires accurate placement on the antenna’s focal point, as such