Terrestrial Transmission
- They cannot pass through any obstacle.
- They Use directional Parabolic Antenna.
- Signals are highly focused.
- Line of Sight Transmission is needed i.e. their path should be free of any sort of obstacle.
- For long-distance transmission signal strength weakens.
- Repeaters are used for every 35-40 km as such.
Advantages
- They are used to carry thousands of voice channels at the same time.
- Data Transmission rate of 16 Gbps.
Disadvantages
- Installation cost is high.
- Maintaining a LOS or obstacle-free path for a long distance is a difficult task.
- EMI effect and jamming affect the signal strength.
Applications
- Cellular phone
- Television
- Telephone
Microwave Transmission
Microwave is a part of the electromagnetic Spectrum. Their frequency ranges from 300 MHz to 300 GHz, which corresponds to wavelengths of 1 mm to 30 cm. Sending and receiving information by microwaves is known as Microwave Transmission. Microwaves come under Unguided or wireless transmission media.
The repeaters form a network known as a microwave relay network. But these systems are used only in special roles as they are very expensive. These technologies such as wireless networks, and broadcast satellites broadcast television and radio directly into consumers’ houses. Microwaves can also be used for wireless power transmission.
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