What is RF (Radio Frequency) and what frequency range does it cover?

RF (Radio Frequency) refers to electromagnetic waves in the frequency range of approximately 3 kHz to 300 GHz. This spectrum is used for wireless communication, broadcasting, and radar systems. The RF spectrum is divided into bands: VLF (3-30 kHz), LF (30-300 kHz), MF (300 kHz-3 MHz), HF (3-30 MHz), VHF (30-300 MHz), UHF (300 MHz-3 GHz), SHF (3-30 GHz), and EHF (30-300 GHz). Different applications use different bands based on propagation characteristics and bandwidth requirements.