通信卫星从1965年实用以来,不过才近十年时间,但已显示了它的优越性,得到了急速的发展。目前,已初步建成了一个卫星环球通信网,并正在纷纷建立区域性通信网。通信卫星的发展特点是:利用静止轨道卫星,增大通信容量、发射功率、天线数量、卫星重量和寿命。表1以国际通信卫星为例说明之。 Since its practical application in 1965, telecommunications satellites have only been in operation for nearly a decade now, but have shown its superiority and rapid development. At present, a satellite global communications network has been initially established and regional communications networks are being established one after another. The development of communications satellites features: the use of geostationary satellites, increase communication capacity, transmit power, antenna number, satellite weight and life expectancy. Table 1 shows an example of International Telecommunications Satellite.