K band

K band may refer to:

• K band (IEEE), a radio frequency band from 18 to 27 GHz
• K band (infrared), an atmospheric transmission window centred on 2.2 μm
• K band (NATO), a radio frequency band from 20 to 40 GHz

• K_a band, a radio frequency band from 26.5 to 40 GHz
• K_u band, a radio frequency band from 12 to 18 GHz