2 millimeter band

The 2 millimeter band is a portion of the EHF (microwave) radio spectrum internationally allocated to amateur radio and amateur satellite use. The amateur radio and amateur satellite band is between 134 GHz and 141 GHz. Amateurs operate on a primary basis between 134 GHz and 136 GHz, and on a secondary basis in the rest of the band. Also, amateurs must protect the radio astronomy service from harmful interference between 136 GHz and 141 GHz. The ITU's allocations are the same in all three ITU Regions.