E band

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E band
NATO E band
Frequency range 2–3 GHz
Wavelength range 1.5–1 dm
Related bands S band (IEEE) · UHF (ITU)
Waveguide E band
Frequency range 60–90 GHz
Wavelength range 5–3.33 mm
Related bands V band (IEEE) · W band (IEEE) · EHF (ITU)
ITU Radio Band Numbers

1 2 3 4 5 6 7 8 9 10 11 12

ITU Radio Band Symbols

ELF SLF ULF VLF LF MF HF VHF UHF SHF EHF THF

NATO Radio bands

A B C D E F G H I J K L M

IEEE Radar bands

HF VHF UHF L S C X Ku K Ka V W mm

Television and radio bands

I II III IV V VI

NATO E band[edit]

The NATO E band is the range of radio frequencies from 2 GHz to 3 GHz in the system of letter designations for frequency bands used by the NATO for electronic countermeasure (ECM) applications.[1][2] This is equivalent to wave lengths between 15 cm and 10 cm. The E band lies at the upper end of the UHF range of the radio spectrum, as defined by the ITU.[3] The NATO E band corresponds to the lower half of the S band (2–4 GHz) of the older IEEE classification system.[4]

Waveguide E band[edit]

The waveguide E band is the range of radio frequencies from 60 GHz to 90 GHz in the electromagnetic spectrum,[5][6] corresponding to the recommended frequency band of operation of WR12 waveguides. These frequencies are equivalent to wave lengths between 5 mm and 3.333 mm. The E band is in the EHF range of the radio spectrum.

Atmospheric effects[edit]

At these high frequencies the short wavelengths give the radiation a very directional quality, similar to visible light. Many molecules possess rotational and vibrational states excited by very specific wavelengths in this band, thus the atmospheric gasses such as oxygen, water vapor, carbon dioxide and nitrogen can absorb, and be excited causing variable beam attenuation effects dependent on meteorological and atmospheric conditions.

Applications[edit]

See also: W band

In October 2003, the Federal Communications Commission (FCC) ruled that spectrum at 71 to 76 GHz, 81 to 86 GHz and 92 to 95 GHz was available for high-density fixed wireless services in the United States.[7]

The Radio Regulations of the International Telecommunication Union allow amateur radio and amateur satellite operations in the frequency range 76.000 GHz to 81.000 GHz, which is known as the 4-millimeter band.

References[edit]

  1. ^ Leonid A. Belov; Sergey M. Smolskiy; Victor N. Kochemasov (2012). Handbook of RF, Microwave, and Millimeter-Wave Components. Artech House. pp. 27–28. ISBN 978-1-60807-209-5. 
  2. ^ Norman Friedman (2006). The Naval Institute Guide to World Naval Weapon Systems. Naval Institute Press. pp. xiii–xiv. ISBN 978-1-55750-262-9. 
  3. ^ "V.431: Nomenclature of the frequency and wavelength bands used in telecommunications". ITU-R. 2006-01-04. Retrieved 2014-02-03. 
  4. ^ "521-2002 - IEEE Standard Letter Designations for Radar-Frequency Bands". IEEE. 2003-01-14. doi:10.1109/IEEESTD.2003.94224. Retrieved 2014-02-03. (subscription required (help)). 
  5. ^ Victor L. Granatstein (26 March 2012). Physical Principles of Wireless Communications, Second Edition. CRC Press. p. 6. ISBN 978-1-4398-7897-2. 
  6. ^ Jonathan Wells (2010). Multigigabit Microwave and Millimeter-Wave Wireless Communications. Artech House. p. 4. ISBN 978-1-60807-083-1. 
  7. ^ Wells, Jonathan (May 2006). "Multigigabit wireless technology at 70 GHz, 80 GHz and 90 GHz, RF Design". Defense Electronics Magazine. Retrieved 2014-03-03.