Radio frequency Guide, Meaning , Facts, Information and Description
- RF can also denote rheumatoid factor
Band name Abbr ITU band Frequency Wavelength < 3 Hz > 100,000 km Extremely low frequency ELF 1 3-30 Hz 100,000 km - 10,000 km Super low frequency SLF 2 30-300 Hz 10,000 km - 1000 km Ultra low frequency ULF 3 300-3000 Hz 1000 km - 100 km Very low frequency VLF 4 3-30 kHz 100 km - 10 km Low frequency LF 5 30-300 kHz 10 km - 1 km Medium frequency MF 6 300-3000 kHz 1 km - 100 m High frequency HF 7 3-30 MHz 100 m - 10 m Very high frequency VHF 8 30-300 MHz 10 m - 1 m Ultra high frequency UHF 9 300-3000 MHz 1 m - 100 mm Super high frequency SHF 10 3-30 GHz 100 mm - 10 mm Extremely high frequency EHF 11 30-300 GHz 10 mm - 1 mm Above 300 GHz < 1 mm
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, SLF, ULF, and VLF bands overlap the AF (audio frequency) spectrum, which is approximately 20–20,000 Hz. However, sounds move at the speed of sound, rather than the speed of light.
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).
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Named frequency bands
Microwave (IEEE US)
L band
1 to 2 GHz
S band
2 to 4 GHz
C band
4 to 8 GHz
X band
8 to 12 GHz
Ku band
12 to 18 GHz
K band
18 to 26 GHz
Ka band
26 to 40 GHz
V band
40 to 75 GHz
W band
75 to 110 GHz