Difference between Terrestrial Microwave and Satellite Microwave Transmission System

Terrestrial Microwave Transmission System (TMTS):
In these systems, the signals are extremely concentrated and the physical route must be line of sight. The signals in these systems are extended with the help of Relay towers. Terrestrial Microwave Systems need directional parabolic antennas to broadcast and receive signals in the lower gigahertz range.

Satellite Microwave Transmission System (SMTS):
Satellite Microwave Transmission System uses satellites for broadcasting and receiving of signals. These systems need satellites which are in the geostationary orbit which is 36000 km above the earth. The satellites operates as repeaters with receiving antenna, transponder and transmitting of signals.

The difference between terrestrial microwave and satellite microwave transmission systems are as follows:

Terrestrial Microwave Transmission System Satellite Microwave Transmission System
1. The frequency range needed is from 4 GHz to 6 GHz. The frequency range used in this system is between 11 GHz to 14 GHz.
2. In this system, attenuation mainly depends on frequency and signal strength. Attenuation is generally affected by the frequency and power.
3. In terrestrial microwave transmission system, signal requirements make installation moderately difficult. In satellite microwave transmission system, the installation of satellites is extremely tough.
4. It requires focused signals and line of sight as physical path. It requires the proper alignment of earth station antennas.
5. In these systems, short distance systems can be inexpensive but long distance systems are almost costly. These systems are very expensive as cost of building and launching is very high.
6. Relay towers are used to extend the signals. Satellites are used for the expansion of signals.

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