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Encyclopedia > ISM band

The industrial, scientific and medical (ISM) radio bands were originally reserved internationally for non-commercial use of RF electromagnetic fields for industrial, scientific and medical purposes. A band is a small section of the spectrum of radio communication frequencies, in which channels are usually used or set aside for the same purpose. ...

The ISM bands are defined by the ITU-R in 5.138 and 5.150 of the Radio Regulations. Individual countries' use of the bands designated in these sections may differ due to variations in national radio regulations. The ITU Radiocommunication Sector (ITU-R) is a standards body subcommittee of the International Telecommunication Union (ITU) relating to radio communication. ... The Radio Regulations is an intergovernmental treaty text of the International Telecommunication Union (ITU), the Geneva based specialised agency of the United Nations which coordinates and standardises the operation of telecommunication networks and services and advances the development of communications technology. ...

In recent years they have also been used for license-free error-tolerant communications applications such as wireless LANs and Bluetooth: To meet Wikipedias quality standards, this article or section may require cleanup. ... This article is about the Bluetooth wireless specification. ...

  • 900 MHz band (33.3 cm wavelength)
  • 2.4 GHz band (12.5 cm wavelength)
  • 5.8 GHz band (5.2 cm wavelength)

(using an approximation to the speed of light of 3×108 m/s) MegaHertz (MHz) is the name given to one million (106) Hertz, a measure of frequency. ... A centimeter is an SI unit of length. ... The wavelength is the distance between repeating units of a wave pattern. ... A gigahertz is a billion hertz or a thousand megahertz, a measure of frequency. ... Cherenkov effect in a swimming pool nuclear reactor. ...

IEEE 802.11b/g wireless Ethernet also operates on the 2.4 GHz band, and most microwave ovens use 2.45 GHz. IEEE 802. ... Ethernet is a frame-based computer networking technology for local area networks (LANs). ... Microwave oven A microwave oven, (or microwave), is a kitchen appliance employing microwave radiation primarily to cook or heat food. ...

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This helps ensure maximum coverage of the array for service providers in the 2.4GHz ISM band.
Since this array is horizontally polarized, it is ideal for use in areas susceptible to the affects of interference generated by commonly used vertically polarized wireless LAN equipment.
This helps ensure maximum coverage of the array for service providers in the 5.8GHz ISM band.
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