According to the ITU designations, the Q-band is a frequency band that lies in the millimeter-wave (EHF) range between 33 GHz and 50 GHz and covers parts of the V-band and the Ka-band. These specifications refer to microwave technology. In radar technology, the corresponding frequency band is the V-band between 40 GHz and 75 GHz. There is no U-band in the nomenclature of the International Telecommunication Union (ITU).
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