Studied was an X-band Backward Wave Oscillator (BWO) which could be filled both with a hard vacuum and with plasma. The observed power output was about 40MW in the vacuum BWO with a frequency of 8.5 GHz and a bandwidth of 0.5GHz. After filling with plasma, the power output increased by a factor of 6. The bandwidth increased to 2 GHz, with a frequency up-shift of about 1 GHz. In addition, we tested four different shapes of cathode, and found an optimum shape.
- Pub Date:
- September 1990
- Backward Wave Tubes;
- Microwave Oscillators;
- Electronics and Electrical Engineering