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Spectrum

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Spectrum is the distribution of wavelengths and frequencies.

In scanning and radio frequency uses, we often refer to a bandwidth of spectrum as a "band". These "bands" are frequencies that exist in a continuous range and usually have a common characteristic which identify it as a type of band.

These bands are divided by the area of the spectrum in which they are located. Those "bands" are commonly accepted to conform to the following table:

Spectrum Table
Abbreviation Name Frequency Wavelength
ELF Extremely Low Frequency < 3 kHz > 100 km
VLF Very Low Frequency 3 kHz - 30 kHz 100 km - 10 km
LF Low Frequency 30 kHz - 300 kHz 10 km - 1000 m
MF Medium Frequency 300 kHz - 3 MHz 1000 m - 100 m
HF High Frequency 3 MHz - 30 MHz 100 m - 10 m
VHF Very High Frequency 30 MHz - 300 MHz 10 m - 1 m
UHF Ultra High Frequency 300 MHz - 3 GHz 1 m - 10 cm
SHF Super High Frequency 3 GHz - 30 GHz 10 cm - 1 cm
EHF Extremely High Frequency 30 GHz - 300 GHz 1 cm - 1 mm


References