Study on 1THz Staggered Double-Grating Backward Wave Oscillator

Backward wave oscillator (BWO) is one of the ideal devices for generating terahertz wave. BWO has many advantages, such as tunable frequency, high efficiency, and high frequency. Therefore, BWO is very popular in military and satellite fields. In our current work, we have carried out research on BWO operating at a frequency of 1 THz. We use a staggered double-grating structure with circular electron beam channels as high-frequency structure. When the operation voltage of the electron beam is 25 kV, the beam current is 15 mA, the stable output power of the BWO is 178mW, and the oscillation frequency is 1.044THz.