Microwave radiation is also a popular medium of transmission. It does not require the laying of expensive cables. Microwave links use very high frequency radio waves to transmit data through space. Microwave links use repeaters at intervals of about 25 to 30 km in between the transmitting and receiving stations
Parabolic antennas are mounted on towers to send a beam to another antenna which could be tens of kilometers away, but should be in the line of sight. The higher the tower the greater is the range. Microwave radio transmission is widely used for long-distance communication. It overcomes the problem of weak signals.
Advantages
- Building two towers is cheaper than digging a 100 km trench and laying cables in it.
- It can permit transmission rates of about 16 giga (1 giga bit = 10 to the power of 9 bits) bits per second.
Disadvantages
- Repeaters, if used along the way, are to be maintained regularly.
- Physical vibration will show up as signal noise.
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2 comments:
now in these days communication media is very helpful to communicate our friends , cousins and near or far places anywhere in the world within seconds.this is very great achievement of science.
microwave computer
now in these days communication is the greatest achievement of science with the help of this we can easily communicate anywhere in the world.
microwave computer
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