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J band

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Title: J band  
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Subject: List of nearest stars and brown dwarfs, BEL Battle Field Surveillance Radar, Radio spectrum, MWband/doc, K band
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J band

J band can refer to three different regions of the electromagnetic spectrum, in the radio and near-infrared.


  • NATO 1
    • Uses 1.1
  • JRC 2
  • Infrared astronomy 3
  • References 4


The NATO J band is the range of NATO for electronic countermeasure (ECM) applications.[1][2] This is equivalent to wavelengths between 3 and 1.5 centimetres (1.18 and 0.59 in).

The J band is a subset of the SHF band as defined by the ITU.[3] The J band intersects with the X band and K band of the older IEEE classification system.[4] The Ku band is within the J band.[4]


The J band is used for satellite communications and radar, the latter being central to aircraft systems and their avionics. Satellite communications systems can be used in conjunction with aircraft to help locate and identify enemy targets or provide a role as a reconnaissance platform for soldiers on the ground.


In the United Kingdom, the term "J Band" is also used by the Joint Radio Company to refer to their VHF communications band at 139.5-140.5 and 148-149 MHz used by fuel and power industries.[5]

Infrared astronomy

Atmospheric windows in the infrared. The J band is the transmission window centred on 1.25 micrometres

In infrared astronomy, the J band refers to an atmospheric transmission window centred on 1.25 micrometres (in the near-infrared). Betelgeuse is the brightest near-IR source in the sky with a J band magnitude of -2.99.[6] The next brightest stars in the J band are R Doradus (-2.6), Arcturus (-2.2), and Aldebaran (-2.1).[7] In the J band Sirius is the 9th brightest star.


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  4. ^ a b
  5. ^ Joint Radio Company
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  7. ^
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