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针对微放电测试所需大功率微波源的需求,试验研究了一种用于微放电测试的S波段注入锁频磁控管试验方法。基于注入锁频连续波磁控管的理论,试验得到了磁控管的注入锁频带宽与注入比成正比关系。改变阳极电流,得到磁控管输出功率389~1 150W。通过注入锁频抑制了磁控管输出信号的边带噪声,提高注入功率拓宽了磁控管的锁频带宽,获得了高达12.6MHz的注入锁频带宽。在同时注入双频参考信号的锁频试验中,观察到了磁控管注入双锁频、杂散抑制功和功率分配的现象。该试验的结果为用于微波大功率微放电的微波源提供了试验依据。
In order to meet the demand of high power microwave source for micro-discharge test, a test method of S-band injection frequency-locked magnetron for micro-discharge test is studied. Based on the theory of injection frequency-locked continuous-wave magnetron, the injection-locked bandwidth of the magnetron is proportional to the injection ratio. Change the anode current, get the magnetron output power 389 ~ 1 150W. By injection locking, the sideband noise of the magnetron output signal is suppressed and the injection power is increased to broaden the frequency locking bandwidth of the magnetron. The injection frequency locking bandwidth of up to 12.6MHz is obtained. In the frequency-locked test, which simultaneously injected dual-frequency reference signals, the phenomena of double-frequency injection, spurious suppression and power distribution of magnetrons were observed. The results of this experiment provide the experimental basis for the microwave source for microwave high-power micro-discharge.