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 ?
Generally speaking, technology experts welcome innovations such as cognitive radios and ultra wideband with enthusiasm and set forth the argument that these innovations will contribute significantly in reducing the barriers to access the radio frequency spectrum (possibly enabling an open access spectrum commons in the future).
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.
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.
The Australian Government previously sought public comment on the benefits and costs of maximising what has become known as Australia's digital dividend', the term used to describe the radio frequency spectrum made available as a result of the switchover to digital-only television, and in doing so has announced it will release a contiguous block of spectrum between 694MHz and 820MHz to be freed-up from switchover.
Raytheon~s 3DELRR system is a gallium nitride (GaN)-based radar that operates in the C-band of the radio frequency spectrum.
Transition to digital broadcasting will lead to creation of new communication networks, enhancement of effectiveness of use of radio frequency spectrum," he added.
This article addresses radio frequency spectrum, which begins below 10 kilohertz (kHz) and extends above 250 gigahertz (GHz).
Max Telecom OOD (for 2 N 8 MHz), 4G Com EAD (2 N 8 MHz) and Bulsatcom AD (2 N 5 MHz) will provide public electronic communications services in the1800 MHz range of the radio frequency spectrum for ten years, the Communications Regulation Commission (CRC) said.
The physics of the radio frequency spectrum mean that certain frequencies are better suited for certain applications and that interference between systems must be considered.
The topics of the conference have been designed to converse on the most pertinent challenges facing the industry at the current time especially the radio frequency spectrum management.
Raytheon's 3DELRR system is a gallium nitride(GaN)-based radar that operates in the C-band of the radio frequency spectrum.

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