I band

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NATO I band
Frequency range
8 – 10 GHz
Wavelength range
3.75 – 3 cm
Related bands
  • X (IEEE)
  • SHF (ITU)

The NATO I band is the range of radio frequencies from 8 GHz to 10 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 wavelengths between 3.75 cm and 3 cm. It is a subset of the SHF band as defined by the ITU and corresponds to the lower half of the X band (8–12 GHz) as defined by the IEEE.[3][4]


Marine navigation radars often operate with I band frequencies.


  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)).