radio frequency

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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 ?
After assessment of the patient, we explained the various neuroablative procedures, like Radiofrequency Ablation, for managing cancer pain.
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Shanti explained that the evolution of Pulsed Radiofrequency thermo-coagulation has been rampant because of many reasons, first of all when done on the spine it is a curative technique not a palliative.
Radiofrequency ablation of cardiac arrhythmias uses low voltage and high frequency electrical energy.
The biochemical processes by which microwaves radiofrequency affect the function of biological system of living organisms are not very fully understood and the mechanism of action could vary according to the frequency, amplitude of the field and the irradiation duty cycle [28,29].
This report covers the present scenario and growth prospects of the Global Radiofrequency Ablation Devices market for the period 2015-2019.
Radiofrequency is a method which uses high frequency radio waves that heat the cells of turbinate and consequently causes coagulation necrosis.
Because the waitlist for a hip arthroplasty was in excess of one year, thermal radiofrequency lesioning of the articular branches was offered in the interim.
Despite the lack of well-designed trials supporting its use, there is published evidence indicating that pulsed radiofrequency (PRF) may effectively manage certain chronic neuropathic pain conditions when other treatments have failed.