Rainfall Attenuation Characteristic Analysis in Ka-band Satellite Communication System

Using Ka-band (30/20 GHz) to form a satellite communication system is the development trend of satellite communications in the future, and it is significant for the future development of China’s satellite communications to research and develop the Ka-band satellite communication system. But the rainfall attenuation is one of the important factors affecting the transmission quality in Ka-band satellite communication system. This paper analyzes the effects of altitude, radio frequency and satellite position on rainfall attenuation based on the rainfall rate of major cities in China, according to the rainfall attenuation prediction model given by ITU-R. The results can be used to design the Ka-band satellite communication system to reduce the influence of rainfall attenuation.