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Radio frequency, or RF, refers to that portion of the electromagnetic spectrum in which electromagnetic waves can be generated by alternating current fed to an antenna. Such frequencies account for the following parts of the spectrum:

Band name	Abbr	ITU band	Frequency	Wavelength
			< 3 Hz	> 100,000 km
Extremely low frequency	ELF	1	3–30 Hz	100,000 km – 10,000 km
Super low frequency	SLF	2	30–300 Hz	10,000 km – 1000 km
Ultra low frequency	ULF	3	300–3000 Hz	1000 km – 100 km
Very low frequency	VLF	4	3–30 kHz	100 km – 10 km
Low frequency	LF	5	30–300 kHz	10 km – 1 km
Medium frequencyMedium frequency or MF (sometimes called mediumwave) refers to radio frequencies (RF) in the range of 300-3000 kHz. The regular AM broadcast band is found in this range. Radio spectrum.	MF	6	300–3000 kHz	1 km – 100 mM is the thirteenth letter of the Latin alphabet. History The letter M represents the bilabial nasal consonant sound [m] in Classical languages as well as the modern languages. It derives its shape from the Greek Μ or μ. Semitic Mem originally pictu
High frequencyHigh frequency (HF radio frequencies are between 3 and 30 MHz. This range is often called shortwave. Since the ionosphere often reflects HF radio waves quite well, this range is extensively used for medium and long range terrestrial radio communication.	HF	7	3–30 MHz	100 m – 10 m
Very high frequencyVery high frequency (VHF is the radio frequency range from 30 MHz (wavelength 10 m) to 300 MHz (wavelength 1 m). Common uses for VHF are FM radio broadcast at 88-108 MHz and television broadcast (together with UHF). VHF is also commonly used for terrestri	VHF	8	30–300 MHz	10 m – 1 m
Ultra high frequencyThis article is about the radio frequency. See also UHF (movie Ultra high frequency (UHF radio frequencies are those between 300 MHz and 3. 0 GHz, which is higher than those of very high frequency (VHF). UHF and VHF are the most common frequency bands for	UHF	9	300–3000 MHz	1 m – 100 mm
Super high frequency	SHF	10	3–30 GHz	100 mm – 10 mm
Extremely high frequency	EHF	11	30–300 GHz	10 mm – 1 mm
			Above 300 GHz	< 1 mm

Note: above 300 GHz, the absorption of electromagnetic radiation by Earth's atmosphere is so great that the atmosphere is effectively opaque to higher frequencies of electromagnetic radiation, until the atmosphere becomes transparent again in the so-called infrared and optical window frequency ranges.

The ELF, SLF, ULF, and VLF bands overlap the AF ( audio frequency) spectrum, which is approximately 20–20,000 Hz. However, sounds move at the speed of sound, rather than the speed of light.

Electrical connectors designed to work at radio frequencies are known as RF connectors. RF is also the name of a standard audio/video connector, also called BNC (BayoNet Connector).