What is frequency band

To prevent interference between different users, the generation and transmission of radio frequency bands is strictly regulated by national laws, coordinated by an international body, the International Telecommunication Union ITU. The ITU based in Geneva, Switzerland is a member of UN development group, coordinates the shared global use of the radio spectrum, promotes international cooperation in assigning satellite orbits, works to improve telecommunication infrastructure in the developing world, and assists in the development and coordination of worldwide technical standards.

A radio frequency band is a small contiguous section of the radio spectrum frequencies, in which channels are usually used or set aside for use. For example, broadcasting, mobile radio, or navigation devices, will be allocated in non-overlapping ranges of frequencies. For each of these bands the ITU has a band plan which dictates how it is to be used and shared, to avoid interference and to set protocol for the compatibility of transmitters and receivers.

Each of these bands has a traditional name. FM, television broadcasts, line-of-sight ground-to-aircraft and aircraft-to-aircraft communications, land mobile and maritime mobile communications, amateur radio, weather radio.

Radio astronomy, high-frequency microwave radio relay, microwave remote sensing, amateur radio, directed-energy weapon, millimeter wave scanner, wireless LAN US Institute of Electrical and Electronic Engineers IEEE has been quite productive and made a very salient contribution by introducing further classification of microwave range.

Thanks to IEEE the frequency bands in the microwave range are designated by letters. This classification has also become widely used standard for radar bands. This convention began around World War 2 with military designations for frequencies used in radar, which was the first application of microwaves.

Main Antenna Page. How can your cell phone and your television work at the same time? Both use antennas to receive information from electromagnetic waves, so why isn't there a problem? The answer goes back to the fundamental secret of the universe. No matter what information you want to send, that waveform can be represented as the sum of a range of frequencies. By the use of modulation which in a nutshell shifts the frequency range of the waveform to be sent to a higher frequency band , the waveforms can be relocated to separate frequency bands.

Television is broadcast primarily at MHz. FM radio operates between Definition of frequency band. Love words? Start your free trial today and get unlimited access to America's largest dictionary, with: More than , words that aren't in our free dictionary Expanded definitions, etymologies, and usage notes Advanced search features Ad free!

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