RF Frequencies

RF Frequencies

Very low Frequency
1. 3 KHZ to 3MHZ
2. VLF,LF,MF,
3. Very long-range communication (ships at sea, and so forth), commercial AM radio. Ground waves circle the Earth.
High frequency
1. 3 to 30 MHz
2. HF
3. Over-the-horizon communication, Signals reflect from ionosphere.
Very high frequency
1. 30 to 300 MHz
2. VHF
3. Mobile communication, TV, and commercial FM radio. Line-of-sight required.
Ultra high frequency
1. 300 HZ to 1 GH
2. UHF
3. Mobile communication and TV. Line-of-sight required.
Microwave
1. 1 to 30 GHz
2. MH
3. TV and telephone links, satellite links. Line-of-sight required.
Millimeter wave:
1. 30 to 100 GHz
2. MMW
3. Very short-range communication. Requires line-of-sight, high absorption in rain and fog.

Zusammenfassung der Ressource

	Erstellt von Mohammed AbdAlla3586 vor mehr als 8 Jahre