Now You're Talking!: All You Need to Get Your First Ham Radio License (Now Youre Talking, 5th Ed) Passport to World Band Radio: 2004 (Passport to World Band Radio, 2004) 40 Watts from Nowhere : A Journey into Pirate Radio World Radio TV Handbook 2004: The Directory of Global Broadcasting Say Again, Please: Guide to Radio Communications Radio: An Illustrated Guide Darwin's Radio : In the next stage of evolution, humans are history... Trans-Sister Radio The Voice on the Radio

Radio frequency

(Redirected from RF)

Radio frequency, or RF, refers to that portion of the electromagnetic spectrum in which electromagnetic waves can be generated by alternating current fed to an antenna. Such frequencies account for the following parts of the spectrum:

Extremely low frequency (ELF, ITU band 2): Below 300 Hz

Voice frequency (VF, ITU band 3): 300-3000 Hz

Very low frequency (VLF, ITU band 4): 3-30 kHz

Low frequency (LF, ITU band 5): 30-300 kHz

Medium frequency (MF, ITU band 6): 300-3000 kHz

High frequency (HF, ITU band 7): 3-30 MHz

Very high frequency (VHF, ITU band 8): 30-300 MHz

Ultra high frequency (UHF, ITU band 9): 300-3000 MHz

Super high frequency (SHF, ITU band 10): 3-30 GHz

Extremely high frequency (EHF, ITU band 11): 30-300 GHz

Note: above 300 GHz, the absorption of electromagnetic radiation by Earth's atmosphere is so great that the atmosphere is effectively opaque to higher frequencies of electromagnetic radiation, until the atmosphere becomes transparent again in the so-called infrared and optical window frequency ranges.

The ELF, VLF and VF bands overlap the AF (audio frequency) spectrum, which is approximately 20-20,000 Hz.

Electrical connectors designed to work at radio frequencies are known as RF connectors. RF is also the name of a standard audio/video connector, also called BNC (BayoNet Connector).

Named Frequency Bands

• Band III - 174-245 MHz
• ISM band......specific frequencies vary

Microwave (US)

• L-band........1 to 2GHz
• S-band........2 to 4GHz
• C-band........4 to 8GHz
• X-band........8 to 12GHz
• Ku-band......12 to 18GHz
• K-band.......18 to 26GHz
• Ka-band......26 to 40GHz
• V-band.......40 to 75Ghz
• W-band.......75 to 110GHz

See also

• Radio propagation

Now You're Talking!: All You Need to Get Your First Ham Radio License (Now Youre Talking, 5th Ed)		Passport to World Band Radio: 2004 (Passport to World Band Radio, 2004)		40 Watts from Nowhere : A Journey into Pirate Radio		World Radio TV Handbook 2004: The Directory of Global Broadcasting
Say Again, Please: Guide to Radio Communications		Radio: An Illustrated Guide		Darwin's Radio : In the next stage of evolution, humans are history...		Trans-Sister Radio
The Voice on the Radio