TWTs for Point to Point D-band Wireless Links

A new project to realize a point to point wireless system above 150 GHz with multigigabit per second data rate is in progress. The upper side of the D-band (151 -174 GHz) offers about 20 GHz with 3 GHz forbidden band for full duplex transmission. The aims it to enable fiber on air capacity with more than 1 km range to provide up to 45 Gb/s data rate. The wireless system works in Frequency Division Duplexing and consists of two front-ends, each of them with a transmitter powered by novel traveling wave tubes (TWT) fed by a directly modulated Resonant Tunnelling Diode (RTD) oscillator. Two TWTs are designed using the double corrugated waveguide at 151 – 161.5 GHz and 161.5 – 174.8 GHz.