J band

J band may refer to:

• J band (infrared), an atmospheric transmission window centred on 1.25 μm
• J band (JRC), radio frequency bands from 139.5 to 140.5 and 148 to 149 MHz
• J band (NATO), a radio frequency band from 10 to 20 GHz

This disambiguation page lists articles associated with the title J band.
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