radio frequency

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Related to RF spectrum: radio spectrum allocation

See also: Radio Frequencies (table)Radio Frequencies
Frequency
(kHz)
Name Abbr.
10–30 Very low VLF
30–300 Low LF
300–3,000 Medium MF
3,000–30,000 High HF
30,000–300,000 Very high VHF
300,000–3,000,000 Ultra high UHF
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radio frequency,

range of electromagnetic waves with a frequency or wavelength suitable for communication uses. Some of these waves serve as carriers of the lower-frequency audio waves; others are modulated by video or digital information. Short waves have relatively high frequencies; long waves have relatively low frequencies. Radio waves are identified by their frequencies, expressed in kilohertz (kHz), i.e., thousands of cycles per second, in megahertz (MHz), i.e., millions of cycles per second, or in gigahertz (GHz), i.e., billions of cycles per seconds. A range, or band, of radio frequencies is assigned to a broadcasting service by the nation in which it operates. In the United States, the Federal Communications CommissionFederal Communications Commission
(FCC), independent executive agency of the U.S. government established in 1934 to regulate interstate and foreign communications in the public interest.
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 is responsible for that task. Signals in the amplitude modulation (AM) broadcast band in the Americas have frequencies ranging from 530 to 1,700 kHz. Frequency modulation (FM) broadcast frequencies in most countries range from approximately 88 MHz to 108 MHz. Other frequencies are assigned to amateur (ham) radio, citizen band (CB) radio, television broadcasting, cellular telephones, global positioning systems, and other uses. Countries cooperate on on a worldwide basis through the International Telecommunication UnionInternational Telecommunication Union
(ITU), specialized agency of the United Nations, with headquarters at Geneva. It was created in 1934 as a result of the merging of the International Telegraph Union (est.
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, which holds periodic conferences. See also the table entitled Radio FrequenciesRadio Frequencies
Frequency
(kHz)
Name Abbr.
10–30 Very low VLF
30–300 Low LF
300–3,000 Medium MF
3,000–30,000 High HF
30,000–300,000 Very high VHF
300,000–3,000,000 Ultra high UHF
..... Click the link for more information.
 for the classification of radio frequencies.

radio frequency

See radio waves.

radio frequency

[′rād·ē·ō ‚frē·kwən·sē]
(electromagnetism)
A frequency at which coherent electromagnetic radiation of energy is useful for communication purposes; roughly the range from 10 kilohertz to 100 gigahertz. Abbreviated rf.
References in periodicals archive ?
About the BB60A Real-time Spectrum Analyzer The BB60A real-time RF spectrum analyzer is the first to market with an RF recorder that uses the USB 3.
The military is heavily dependent on the RF spectrum to communicate essential and urgent information and data instantaneously.
The Invisible Waves RF-Vue T10 Spectrum Analyzer is the world's first touch-tablet RF spectrum analyzer designed specifically for professional wireless audio, although other applications can greatly benefit from this analyzer.
Force level ships also had the ability to make use of commercial satellites for greater bandwidth up to 4 Mbps through the Commercial Wideband Satellite Program (CWSP) accessing service through an AN/WSC-8 SATCOM terminal to a commercial satellite that operated strictly in the C-band portion of the RF spectrum.
Bench-bound engineers will appreciate the low cost of PSA Series 5 RF Spectrum Analyzers, enabling them to justify the purchase of an RF spectrum analyzer for a wide range of tasks, while wireless audio technicians will benefit from instant displays of free audio WiFi channels or problematic interference.
These measurements are integrated with Tektronix Vector Signal Analysis software and take advantage of such advanced features in the Tektronix RSA5000 Spectrum Analyzer as DPX Live RF spectrum display and DPX density trigger to pinpoint the source of intermittent problems.
The RF spectrum is where nearly all commercial and military electromagnetic spectrum dependent systems operate.
The Wi-Jack can also simultaneously function as an air monitor, giving IT staff a view into and control over the RF spectrum.
Utilizing AVX's patented MLO[TM] technology, which matches the CTE of PCB material and provides low loss across a wide RF spectrum, the new X2A Series RF-DC Crossovers and X2B Series RF-RF Crossovers provide low cost and very low profile solutions for applications in which a critical RF circuit trace intersects a DC or an RF circuit.
For military members around the globe, efficiently managing the congested RF spectrum is critical to ensure effective communications and intelligence gathering.
The diagram below identifies the smaller RF spectrum within the electromagnetic spectrum.
The RF spectrum protocol analysis and direction-finding tool is accurate to within 1 dB.