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Frequency allocation

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Frequency allocation

United States radio spectrum frequency allocations chart as of 2011
United States radio spectrum frequency allocations chart as of 2003

Use of radio frequency bands of the electromagnetic spectrum is regulated by governments in most countries, in a Spectrum management process known as frequency allocation or spectrum allocation. Radio propagation does not stop at national boundaries. Giving technical and economic reasons, governments have sought to harmonise the allocation of RF bands and their standardization.

A number standards bodies work on standards for frequency allocation, including:

These standards bodies have assigned frequency bands in three types of allocation:

Sections of the electromagnetic spectrum that are in high demand are usually allocated through auctions.

Contents

  • Daily impact 1
  • International conventions 2
  • See also 3
  • References 4
  • External links 5

Daily impact

Every day, users rely on allocation of frequencies for efficient use of such devices as:

International conventions

The range of "radio frequencies" is a matter of international convention. The separation of countries into the three formal ITU RF allocation regions is one source of different RF allocation policies in different parts of the world. The definition of the ITU Regions is based largely on longitude. According to ITU Radio Regulations section 5.1: Member States assign licenses to stations; article 5 of the ITU regulations allocates frequencies to services (such as broadcasting and mobile). The ITU divides the world into five administrative regions:

A
the Americas,
B
Western Europe,
C
Eastern Europe and Northern Asia,
D
Africa, and
E
Asia and Australasia.

The ITU also categorises states into three Radio regulatory Regions:

Region 1
Europe, Middle East, Africa, the former Soviet Union, including Siberia; and Mongolia;
Region 2
North and South America and Pacific (East of the International Date Line);
Region 3
Asia, Australia and the Pacific Rim (West of the International Date Line).

Thus, the RF allocations fundamentally differ between continents. Longitude may traverse continents, for example, the 40°E meridian crosses Europe (Russia), Asia (Middle East) and Africa.

The division between Europe and the other regions is the root of the different RF allocations in the ITU Radio Regulations, and standards around the world. ITU-R Study group 1 details how and why there are three separate Regions.[1]

See also

References

  1. ^ Haim, Mazar (August 2008). An Analysis of Regulatory Frameworks for Wireless Communications, Societal Concerns and Risk: The Case of Radio Frequency (RF) Allocation and Licensing (PDF) (Ph.D. thesis). Middlesex University. Retrieved 2010-09-04. 

External links

  • ITU Radio Regulations - Volume 1 (Article 5) international table of frequencies by ITU Region
  • ; ISBN 92-95003-23-3 from public archives of Abdus Salam International Centre for Theoretical Physics
  • Australian radiofrequency 2009 Spectrum Wall Chart (PDF 300 kb) (from the Australian Communications and Media Authority) On 1 July 2005, the Australian Broadcasting Authority and the Australian Communications Authority merged to become the Australian Communications and Media Authority (ACMA).
  • Canadian Table of Frequency Allocations (from Industry Canada)
  • UK Frequency Allocation Table 2013 (from Ofcom, pdf format)
  • US Frequency Allocation Chart - Covering the range 3 kHz to 300 GHz (from Department of Commerce)
  • Galbi, Douglas (2002), Revolutionary Ideas for Radio Regulation," Section IV, Personal Freedom and Licensing.
  • UnwantedEmissions.com - On-line query of U.S. allocation table, with additional information.
  • Cuadro Nacional de Atribución de Frequencias 2007 (from COFETEL México)
  • [2]- Pakistan Table of Frequency Allocations
  • India Frequency Allocation Plan 2005
  • Japan Frequency Assignment Plan 2008
  • Harvey J. Levin: Pioneering the Economics of the Airwaves
  • The Invisible Resource: Use and Regulation of the Radio Spectrum
  • U.S. spectrum graphic from technology Review, 2010
  • India frequency allocation
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