Ku band is primarily used for satellite communications .
The Ku band ( pronounced "kay-yoo" ) is a portion of the electromagnetic spectrum in the microwave range of frequencies. This symbol refers to "K-under" (in the original German, "Kurz-unten", with the same meaning)—in other words.
The Ka band (Pronounced: "Kay-A Band") covers the frequencies of 26.5-40GHz.
The Ka band is part of the K band of the microwave band of the electromagnetic spectrum .
The so-called 30/20 GHz band is used in communications satellites , uplink in either the 27.5 GHz and 31 GHz bands, and high-resolution, close-range targeting radars aboard military airplanes. Some frequencies in this radio band are used for vehicle speed detection by law enforcement.