【摘要】 简单介绍了雨衰的机理,并以我国原邮电部给出的雨衰模型为基础,根据我国10个主要城市的降雨数据和地理位置参数,计算出轨道位置在80°E的通信卫星在上行水平极化/下行垂直线极化的情况下,Ka波段(30/20GHz)的雨衰A0.01,并就雨衰对下行卫星链路G/T值恶化带来的影响进行了分析讨论,给出了相应的计算方法,最后总结了几种抗雨衰措施。更多还原

【Abstract】 The mechanism of rain attenuation is introduced.Values of rain attenuations at the 10 typical stations in China are given for the satellite communication system(the satellite orbit position:80°E)in Ka-band under the condition of linear polarization.These results are calculated on basis of the ITU-R mode and can be used to design Ka-band satellite communication system reasonably.We further analyze rain attenuation’s effect,and summarize several rain attenuation countermeasures.更多还原