X band
| Frequency range | 8.0–12.0 GHz | 
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| Wavelength range | 3.75–2.5 cm | 
| Related bands | 
| Radio bands | ||||||||||||
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| ITU | ||||||||||||
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| EU / NATO / US ECM | ||||||||||||
| IEEE | ||||||||||||
| Other TV and radio | ||||||||||||
The X band is the designation for a band of frequencies in the microwave radio region of the electromagnetic spectrum. In some cases, such as in communication engineering, the frequency range of the X band is set at approximately 7.0–11.2 GHz. In radar engineering, the frequency range is specified by the Institute of Electrical and Electronics Engineers (IEEE) as 8.0–12.0 GHz. The X band is used for radar, satellite communication, and wireless computer networks.