论文部分内容阅读
一般情况下，地球站具有收发两用功能。它的抛物面天线尺寸较大，例如云港地球站使用的C频段抛物面天线直径为11m；沙河广播影视地球站使用的C频段抛物面天线直径为12m、Ku频段抛物面天线直径为7．6m。这种天线的方向性很强，就像针尖那样指向卫星方向，以确保卫星发射和接收信
Under normal circumstances, the earth station has transceiver function. For example, the C-band parabolic antenna used by Yungang Earth Station is 11m in diameter; the C-band parabolic antenna used by Shahe Radio and Television Earth Station is 12m in diameter and the Ku-band parabolic antenna is 7.6m in diameter. The directivity of this antenna is strong, pointing to the satellite direction just like the tip of a needle to ensure that the satellite transmits and receives signals