Simulation results show that a resonant reflector is able not only to reflect wave but also to pre-modulate electron beam and the BWO will generate relatively high power wave at low applied magnetic field.

• 模拟结果表明 :谐振反射腔不仅起到截止颈的作用 ,还有预调制的作用 ; 在低外加磁场条件下 ,该返波管也能输出较高功率的微波。