Experimental results from the MIT 140 GHz quasioptical gyro-TWT

We present the latest experimental results from a novel 140 GHz quasioptical gyro-TWT at MIT. The gyro-TWT is designed to operate in a higher order HE/sub 06/ mode of a confocal waveguide to produce 100 kW at 140 GHz with a gain of 38 dB. Current experimental results have demonstrated a peak power of 30 kW at 140 GHz with a gain of 29 dB and an unsaturated 3 dB bandwidth of 2.0 GHz. The gyro-TWT interaction structure which is formed by a pair of confocal mirrors exhibits tremendous potential for high average power operation in the W-band and beyond.