radio frequency

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Related to Radio frequency spectrum: electromagnetic spectrum

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 ?
When television broadcasters switch from analog platforms to digital only platforms, the part of the radio frequency spectrum that had been used for broadcasting will be freed up because digital television needs less spectrum than analog television.
One of the key functions of the Radiocommunication Bureau is to develop and implement, through established processes with member states, regulations, standards and coordination procedures for the global management of radio frequency spectrum and satellite orbit resources.
This new organization represents the next critical step in the Department of Defense's transformation of the management of radio frequency spectrum assets and processes.
teaming up with Robyn, a former special assistant to the president for economic policy in the Clinton administration, analyze and compare two alternative methods for governing the radio frequency spectrum in the United States: a market approach that treats licensed access to the spectrum as private property and an unlicensed commons approach.
The commission focused on one problem--the shortage of radio frequency spectrum dedicated to public safety--and failed to address the bigger picture, he said.
The electromagnetic radio frequency spectrum is critical to the development and operation of a variety of military systems such as radios, radars, and satellites.
Unlike a lot of other countries that have radio frequency spectrum to play with, the U.
Movilnet's CDMA2000 and TDMA networks will coexist, allowing the operator to utilise its existing radio frequency spectrum.
For this year, INDOTEL plans to procure: (a) technical assistance to prepare regulations: tariff and costs of telecom services, and competition policy; (b) technical assistance to conduct demand studies for telecom services in rural and low-income urban areas; (c) technical assistance for the design of e-health, and e-education programs; (d) training of regulatory entity staff; (e) a Customer Relationship Management (CRM) solution for the whole entity; and (f) a radio frequency spectrum management and monitoring system.
The program, known as "WolfPack" and valued at more than $40 M, is aimed at developing technologies that will enable radio frequency spectrum dominance against advanced communications and radar in the tactical battlespace.
In at least two situations - the radio frequency spectrum squeeze and in hiring - Edwards is in the forefront of Defense Department initiatives aimed at easing those problems, the general said.
With this type of technology, the 50-year-old entrepreneur says Sentel, which employs 56, can make the radio frequency spectrum more useable.

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