Sub-THz Traveling Wave Tubes for Novel Wireless High Capacity Networks

The substantial increase of internet traffic forecasted in the near future, exceeds the capacity of the actual wireless networks at sub-6GHz and at low millimeter wave frequencies. The spectrum above 100 GHz has very wide frequency bands to provide multigigabit per second (Gb/s) data rate, not yet utilized for the high path loss and rain attenuation. The low output power from solid state amplifiers is not sufficient to ensure long range with high signal-to-noise ratio for supporting high data rate. This is even more critical in case of distribution in point to multipoint by a low gain antenna. New wireless links at D-band are development phase to offer tens of Gb/s data rate [1].