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一、前言自1985年以来,我国相继通过租用国际通信卫星IS-V号,实用型的广播电视卫星“东方红Ⅱ号”以及亚洲卫星广播公司的亚洲Ⅰ号卫星进行卫星广播电视转播,卫星广播电视接收在我国得到飞速发展,卫星广播电视接收站的天线口径从原来的7.3m大口径天线逐步转变为使用2～3m的小口径天线。由于接收站的天线口径随着星上转发信
I. Introduction Since 1985, China has successively broadcast satellite and television broadcasts by renting International Telecommunications Satellite IS-V, practical radio and television satellite “Dongfanghong II” and Asia Satellite Broadcasting Corporation’s satellite No. I in Asia, Satellite radio and television reception in our country has been rapid development of satellite radio and television receiving station antenna caliber from the original 7.3m large diameter antenna gradually changed to use 2 ~ 3m small diameter antenna. As the receiving station antenna diameter with the transponder letter