E-band is a higher frequency millimeter wave band (71 GHz to 86 GHz) that supports transmission of high-speed data (~10 Gbps) over short distances (2 km to 3 km).
One such E-band use case example is Band and Carrier Aggregation (BCA), which is a great technique to increase the distance of point-to-point links while at the same time providing better reliability. Combining lower bands such as
15, 18, or 23 GHz with the E-band using dual-band antennas can enable links to cover 7 km to 10 km with capacities that can exceed 10 Gigabits per Second (Gbps).
Frequencies in the E-band are generally allocated on a licensed or lightly licensed basis. This lightly licensed approach offers operators a higher degree of service delivery assurance than the unlicensed V-band spectrum.
Many countries classify the V-band (57 GHz to 71 GHz) as unlicensed spectrum, while only a few countries retain it for licensed or defense applications. The most popular application in the United States is WiGig (based on the 802.11ad WiFi standard), which can be used for both indoor and outdoor applications. The main drawback for unlicensed bands is that the non-exclusive use of the spectrum makes links susceptible to interference.