相位抖动对于相对论速调管放大器来讲是一个重要参数,同微波器件的物理过程密切联系,论文从影响器件相位抖动的物理过程出发,结合模拟程序,研究不同条件下放大器的微波相位抖动,给出影响器件微波相位抖动的物理因素.当微波器件实现稳定放大工作时,输出微波相对于注入微波的相位抖动主要由电子束束压波形的抖动和纹波引起,在一定范围内相位抖动与这种波动成线性关系. Phase jitter is an important parameter for the relativistic klystron amplifier and is closely related to the physical process of the microwave device. Starting from the physical process that affects the device phase jitter, the paper studies the microwave phase jitter of the amplifier under different conditions When the microwave device to achieve a stable amplification work, the phase of the output microwave relative to the injected microwave jitter is mainly caused by the jitter and ripple of the beam pressure waveform, and within a certain range of phase jitter and this The species fluctuates linearly.