RF stands for Radio Frequency, but it often used in the
sense of “ anything related with EM signals”.
The sine wave is the basic example of a signal that can
be generated, transmitted and received with RF
Frequency Band: the standard name of a specific
range of frequencies.
HF: High Frequency, 3 MHz to 30 MHz
VHF: Very High Frequency, 30 MHz to 300 MHz
UHF: Ultra High Frequency, 300 MHz to 3 GHz
SHF: Super High Frequency, 3 GHz to 30 GHz
EHF: Extra High Frequency, 30 GHz to 300 GHz