C-Band VSAT Antenna Systems
C-Band ranges from 4 to 8 GHz. It was the original frequency allocation for telecommunications satellites and is still largely used today. Standard C-Band satellites use the frequency range from 3.7 to 4.2 GHz for downlink - from satellite to earth - and from 5.925 to 6.425 GHz for uplink.
The lower frequencies of C-Band suffer much less from rain attenuation than the higher Ku-Band or Ka-Band frequencies and thus perform better under adverse weather conditions. The draw back is that C-Band needs larger antennas and higher transmission power.