Radio frequency

Radio frequency, or RF, is a carrier, or alternating current with or without a signal, at a frequency that can radiate, or propagate, if not shielded. Such frequencies account for the following parts of the electromagnetic spectrum:

VLF: 3-30 kHz LF: 30-300 kHz MF: 300-3000 kHz HF: 3-30 MHz VHF: 30-300 MHz UHF: 300-3000 MHz SHF: 3-30 GHz EHF: 30-300 GHz

Analog signals that are not RF include IF (intermediate frequency) and AF (audio frequency, 20-20000 Hz).