The Ku band (
pronounced "kay-yoo"; Kurtz-under band) is a portion of the
electromagnetic spectrum in the
microwave range of frequencies ranging from 12 to 18
GHz according to the formal definition of radar frequency band nomenclature in IEEE Standard 521-2002 (Note: in the region 10 - 12 GHz the working definitions of Ku band and
X band overlap; satellite communications engineers would generally regard frequencies above 10 GHz as being part of the Ku band).
See more at Wikipedia.org...