Improvement of communication capacity of a satellite with Ku-, Ka-band and millimeter-wave frequencies during rain attenuation

摘要

Atmospheric effects play a major role in the design of satellite to earth links when operating at higher frequencies above 10 GHz. Raindrops absorb and scatter radio signal which leads to signal attenuation and reduction of the system availability and communication capacity of a satellite. Therefore to overcome the rain attenuation, various countermeasure techniques such as site diversity, frequency diversity [1], orbital diversity [2] etc. are developed. In this paper we are concerned in frequency diversity as a recovery technique against the rainfall attenuation occurred between satellites to earth links. Our target is to improve the communication capacity of a satellite with the simultaneous use of Ku, Ka-band and millimeter-wave frequencies (40 GHz).