Development of a W-band gyrotron backward wave oscillator

This paper presents the development of a fundamental harmonic TE01 mode W-band gyrotron backward-wave oscillator (Gyro-BWO). The MIG employs a triode configuration to generate a helical electron beam with the current of 1.5 A, the voltage of 30 kV, and a pitch factor of 1.0. A mode-converter free reflective cavity is employed. Simulation reveals that the TE01 mode reflective cavity is capable of generating highest output power up to 10.7 kW with a tunable 3dB bandwidth of about 4 GHz. The present system is aiming at providing a 3kW average power in a tunable bandwidth of 3GHz around 94GHz.