Abstract
The effect of the injection locking on the modulation feature of a continuous wave magnetron is demonstrated experimentally. The high-frequency signal is coupled to the power supply, via the designed coupling circuit, as the anode voltage ripple, which results in the amplitude modulation of the magnetron. The spectra of output microwave oscillations are measured after the reference signal is injected into the magnetron. The results of the measurements show that the injection locking cannot eliminate the sidebands caused by the high-frequency coupled modulation. Characteristics of modulation are not changed within the locking bandwidth although the injection frequency varies. The amplitude of sidebands is basically not changed with variation in the injection ratio. Finally, the relationship between the injection locking and the anode voltage ripple frequency is demonstrated qualitatively.
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