Describe the Characteristics of satellite microwave transmission.

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 Characteristics of satellite microwave transmission:

  • In satellite communication, signal transferring between the sender and receiver is done with the help of satellite. 
  • In this communication, electromagnetic waves are used as carrier signals. These signals carry the information such as voice, audio, video or any other data between ground and space and vice-versa.
  • The transmission of signal from first earth station to satellite through a channel is called as uplink. The frequency with which, the signal is sent into the space is called as Uplink frequency (6Hz). 
  • The satellite transponder converts this signal into another frequency and sends it down to the second earth station. A transponder is used to increase the strength of the received signal and change the frequency band of the transmitted signal from the received one. 
  • The transmission of signal from satellite to second earth station through a channel is called as downlink. The frequency with which, the signal is sent by the transponder is called as Downlink frequency (4GHz).
  • There are three methods of communication using satellites using three modulation techniques as FDMA, TDMA and CDMA
  • If the earth along with its ground stations is revolving and the satellite is stationery, the sending and receiving earth stations and the satellite can be out of sync over time. Therefore Geosynchronous satellites are used which move at same RPM as that of the earth in the same direction. 

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