mmWave
mmWave can refer to spectrum bands from 30-300GHz, but the main frequencies for wireless backhaul that are referred to as mmWave are the 60, 70 and 80Ghz bands. 60GHz is in the V-Band and often unlicensed, 70-80 GHz is in the E-Band.
The advantages of these bands for small cell backhaul is that they offer high capacities with naturally occuring deterioration in wave propogation. In other words, the fact the waves don’t travel very far through air is an actual advantage in situations with lots of nodes or cells in close proximity, where you are trying to limit intereference.
Line of site is required between nodes as the signal will not penetrate buildings, or even heavy foliage. Vendors in this product space are required to think heavily about aesthetics and ease of deployment – municipal regulations may mean these street level solutions may have to be installed by lighting or non-telecoms technicians.
