We consider the influence of an external quasi-monochromatic signal on a multimode gyrotron in the case where the signal frequency is close to the frequency of the operating mode of the gyrotron. The influence of the mode competition on the generation regime at a harmonic frequency modulation is studied. The calculations were performed for a high-power 170 GHz gyrotron developed at the Institute of Applied Physics of the Russian Academy of Sciences (IAP RAS). Depending on the parameters of the gyrotron and the external signal, various generation regimes were determined, including locking of the operating-mode frequency when the radiation frequency is close to the frequency of the external signal, beats of the frequency and amplitude of the operating mode, and excitation of spurious modes.

中文翻译：

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准单色外部信号对多模回旋管频率的锁定

我们考虑在信号频率接近回旋管工作模式频率的情况下，外部准单色信号对多模回旋管的影响。研究了模式竞争对谐波频率调制下的发电方式的影响。计算是针对俄罗斯科学院应用物理研究所 (IAP RAS) 开发的高功率 170 GHz 陀螺仪进行的。根据回旋管和外部信号的参数，确定了各种产生机制，包括当辐射频率接近外部信号频率时锁定工作模式频率，工作模式的频率和幅度的节拍，以及寄生模式的激发。