The Q band is mainly used for satellite communications, terrestrial microwave communications and for radio astronomy studies such as the QUIET telescope. It is also used in automotive radar, and radar investigating the properties of the Earth's surface.
^Atanassov, VB and Balan, MG and Haimov, SJ and Kulemin, GP and Michalev, MA and Mladenov, L.H. and Pedenko, Y.A. and Razskazovsky, VB and Savchenko, AK and Vasilev, VL (1990). "Experimental study of nonstationary X-and Q-band radar backscattering from the sea surface". Radar and Signal Processing, IEE Proceedings F137 (2): 118–124. doi:10.1049/ip-f-2.1990.0017.