Here, I am going to discuss Why 6/4 bands have been the most popular in the satellite?

A 6/4-GHz small-capacity satellite communications system (SC-31 system) is described that minimizes interference with terrestrial radio-relay networks operating in the 6-GHz band. An outline is given of the system and the channel control technique.
 Here,
 Uplink frequency = 6 GHz
 Downlink frequency = 4 GHz

So, 6/4 = Uplink frequency/ Downlink frequency



  1. 6/4 GHz band systems are used in many countries for the purpose of terrestrial communication.
  2. The problem of mutual interference is also reduced if we are using a 6/4 GHz band.
  3. In this band, there is no absorption by the rain.
  4. It has the fewest propagation problems. ...
  5. There is no change of polarization when the waves pass through the ionosphere.
  6. RF Components for these bands were being used for terrestrial relay links also and hence they are easily available.