Definition
A range of radio frequencies between approximately 18 and 27 gigahertz (GHz), used in some airborne radar and satellite communication systems. The K-band sits between the Ku-band (below it) and the Ka-band (above it).
Plain English
A specific slice of very high radio frequencies. Equipment built for this slice — like certain weather or mapping radars — transmits and receives signals in this range.
Context Anchor
Seen in avionics specifications, radar or sensor equipment descriptions, and antenna information.
Derivation
The letter designations (L, S, C, X, Ku, K, Ka) come from World War II radar work, where letters were used as code names to keep the actual frequencies secret. The 'K' originally stood for 'kurz' — German for 'short' — referring to the short wavelength of these signals.
Why Pilots Care
Offers sharper resolution for spotting small weather features or terrain returns, improving avoidance decisions.
Intuition Check
K does not mean “thousand” here. In K-Band, K is just the name of a radio-frequency range.
Example Sentence 1
The aircraft's weather radar operates in the K-band, giving it fine resolution for detecting precipitation.
Example Sentence 2
Maintenance checked the K-band transceiver after the radar display showed unusually sharp ground returns.