K band

From Wikipedia, the free encyclopedia

NATO Radio bands A B C D E F G H I J K L M

IEEE Radio bands G P L S C X Ku K Ka V W

Contents 1 NATO K band 2 IEEE K band 2.1 Subdivisions 3 Infrared astronomy K band

[edit] NATO K band

The NATO K band is defined as a frequency band between 20 and 40 GHz (7.5–15 mm).

[edit] IEEE K band

The IEEE K band is a portion of the electromagnetic spectrum in the microwave range of frequencies ranging between 18 and 27 GHz. K band between 18 and 26.5 GHz is absorbed easily by water vapor (H₂O resonance peak at 22.24 GHz, 1.35 cm).

[edit] Subdivisions

The IEEE K band is conventionally divided into two sub-bands:

• K_a band: K-above band, 27–40 GHz, mainly used for radar and general communications.
• K_u band: K-under band, 12–18 GHz, mainly used for satellite communications.

[edit] Infrared astronomy K band

Infrared astronomers refer to the infrared region around 2.2 micrometres wavelength (136 THz) as K-band.

v • d • e The Electromagnetic Spectrum
(Sorted by wavelength, short to long) Gamma ray • X-ray • Ultraviolet • Visible spectrum • Infrared • Terahertz radiation • Microwave • Radio waves
Visible (optical) spectrum	Violet • Blue • Green • Yellow • Orange • Red
Microwave spectrum	W band • V band • K band: Ka band, Ku band • X band • C band • S band • L band
Radio spectrum	EHF • SHF • UHF • VHF • HF • MF • LF • VLF • ULF • SLF • ELF
Wavelength designations	Microwave • Shortwave • Mediumwave • Longwave