radio frequency

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Related to Radiofrequency: Radiofrequency ablation, Radiofrequency Neurotomy

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 ?
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.
Temperature-controlled radiofrequency volumetric tissue reduction was introduced to otolaryngology practice in 1998.
The international working group reached its conclusion after discussing and evaluating available literature on radiofrequency.
An important question is whether glucose metabolism in the brain would be chronically increased from regular use of a wireless phone with higher radiofrequency energy than those used in the current study.
Decades of scientific research dating back to 1960 has determined that excessive exposure to radiofrequency radiation is hazardous to human health.
All received circumferential radiofrequency ablation of the affected area.
In the study conducted over the period of three years, the team assessed the efficacy and morbidity of combined radiofrequency of the soft palate and partial uvulectomy in 60 patients.
HEALTH POLICY | The Precautionary Principle and Radiofrequency Exposures
NeuroTherm (Wilmington, MA) was awarded a patent (United States Patent 7,574,257) for a multiple output radiofrequency generator used in the treatment of chronic pain.
The report examines the use of a procedure called radiofrequency catheter ablation to treat a type of irregular heartbeat known as atrial fibrillation.
The system consists of a radiofrequency generator and a disposable handheld tool that delivers radiofrequency power combined with saline to permanently seal blood vessels, soft tissue, and bone.