radio frequency


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Related to radio frequency: Radio Frequency Identification, Radio waves

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 ?
Traditional process improvement techniques are not designed to produce savings at the orders of magnitude needed to transform the radio frequency assignment process.
Emerging technology with hand held "Palm" type devices that combine Integrated Computerized Deployment System, Worldwide Port System and Radio Frequency Identification functionality will allow us to fix the problems identified in the test and allow for a quantum leap forward in terms of process efficiency and workload for both the marine cargo specialist and cargo scanning function.
Looking ahead, Holder said Radio Frequency Identification tags will push the military into more sophisticated distribution and consumption analysis.
While radio frequency congestion is a reality for Sailors and Marines, employing spectrum-dependent equipment in a congested environment can be managed if warfighters and acquisition officials recognize the risks and challenges associated with its use.
Our expediters worked side by side with division unit movement officers at the Deployment Training Center to prepare military shipping labels and write Radio Frequency Identification tags three days in advance for each piece of equipment," said Smith.
OTC: RFDL) formulates, tests and deploys vendor neutral UHF radio frequency identification (RFID) solutions for small to medium sized businesses required to comply with retail and government RFID-centric mandates.
With the Worldwide Port System you're working primarily with fort to port in-transit visibility," said Blair Perkins, an engineer with Unisys Radio Frequency Identification.
This report analyzes the worldwide markets for Radio Frequency Identification (RFID) Equipment in Millions of US$.
PITTSBURGH -- As published in the October issue of Healthcare Purchasing News, the Perioperative Services department at NewYork-Presbyterian Hospital (NYP) has been able to reduce the costs of implantable medical device inventory through to the implementation of a clinical resource management system that leverages radio frequency identification (RFID) technology.
NASDAQ:WJCI), a leading designer and supplier of radio frequency (RF) products and solutions for the wireless infrastructure and radio frequency identification (RFID) reader markets, will report financial results for its third quarter 2006 ended October 1, 2006, on Thursday, November 2, 2006, after the market closes.
PLANO, Texas -- To support the opening of the facility in January 2007, THE HEART HOSPITAL Baylor Plano will implement a radio frequency identification (RFID) enabled inventory management system to store, track, and manage the utilization of high cost cardiovascular devices and supplies.
There are areas of overlap between the functionality of many of these technologies - and some conflicts between them due to their use of the same radio frequency spectrum without interoperability or thorough techniques of sharing the resource properly.

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