The designation "Ka-band" is from Kurz-above, which stems from the German word kurz, meaning "short".
IEEE Standard letter designations for Radar Bands define the nominal frequency range for Ka band in the range 27–40 gigahertz (GHz) in Tables 1 and 2 of IEEE Standard 521[2] i.e. wavelengths from slightly over one centimeter down to 7.5 millimeters.
[6] The Kepler Mission used this frequency range to downlink the scientific data collected by the space telescope.
[7] This frequency is also used for remote sensing of clouds by radar, by both ground-based[8] or satellite[9] systems such as INCUS.
5th generation mobile networks will also partially overlap with the Ka band (28, 38, and 60 GHz).