In result, it converted into 4GHz intermediate frequency (IF). The mixer mixes it up the frequencies of an amplifier and local oscillator. Mixer: This part of the satellite receives 6GHz uplink frequencies from the amplifier and 4GHz frequencies from the local oscillator.2.2GHz Local oscillator: Local oscillator generates 2.2GHz frequencies so that the 6GHz amplifier providing frequencies are converted to 4GHz in the mixer.It amplifies these frequencies and transmits it to the mixer. 6 GHz amplifier: This amplifier receives 6GHz uplink weak frequencies from the input filter.It filters the unwanted distortion from the information signal and drives only 6GHz frequencies to the amplifier. Input filter: This is the first part of satellite communication which receives uplink frequencies (5.9GHz to 6.4GHz) from the earth station.2 A Transponder is Consists of the Following Parts.1 Satellite communication system can be consists of the following possible parts.Satellite communication system can be consists of the following possible parts In the following figure a satellite communication system is mentioned, where the role of a transponder is clearly magnified. Although satellite communication system is very expensive the advantage of communicating all over the world at high speed is more important.īlock diagram of satellite communication system These satellites are three in number transmitted into space at the altitude of 22300 miles or 35900km around the globe, which are connected to each other at 1200 angle which cover3600. Considering the limitation of “line of sight” communication the transmission antenna is mounted on a satellite.
The satellite amplifies the information signal taking care of attenuation in the signal and then transmits it to the earth station again. Basically, in satellite communication, the satellite is an RF repeater which receives information signals from the earth station. So satellite communication means that powerful point to point communication system through which at we can communication around the globe at high speed. As we know that satellites are the artificial moving devices which move around the earth with earth speed, means these satellites are synchronized with earth speed.
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