How many different frequency bands are there?

Pursuant to convention, the ITU divides the radio spectrum into 12 bands (as shown in the table below), each beginning at a wavelength which is a power of ten (10n) metres, with corresponding frequency of 3×108−n hertz, and each covering a decade of frequency or wavelength. Each of these bands has a traditional name.

The S-band as defined by IEEE is a frequency range from 2 to 4 GHz . IEEE uses letters to signify a range of frequencies from 1 to 170 GHz.

The textbook definition of a frequency band is an interval in the frequency domain, delimited by a lower frequency and upper frequency . The International Telecommunication Union has assigned designations to these intervals. … The Super Low Frequency (SLF) band is also suitable for submarine communication.