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对一种新型两腔振荡器进行了理论和数字模拟研究.这种结构中的调制腔实现电子束速度调制,调制后的电子束在通过两腔之间一个微波场较弱的区间时实现电子束群聚,然后在换能腔实现电子能量到微波能量的转换,并通过输出结构输出.同时,调制腔和换能腔之间存在微波耦合,换能腔中的一部分微波能量可以耦合到调制腔,形成一个正反馈回路,在一定条件下实行微波振荡.设计了一个X波段的器件,理论效率为29·4%,2·5维ParticleinCell(PIC)程序模拟的效率为28%,微波频率为9·42GHz,微波输出功率为2·25GW.
Theoretical and numerical simulations of a novel two-cavity oscillator are performed in which the modulation cavity implements electron beam velocity modulation and the modulated electron beam realizes electrons as it passes through a weaker interval between the two cavities Beam cluster, and then in the transducer cavity to achieve electronic energy to microwave energy conversion, and output through the output structure.At the same time, there is a microwave coupling between the modulation cavity and the transducer cavity, a portion of the microwave energy in the transducer cavity can be coupled to the modulation Cavity and form a positive feedback loop under certain conditions to implement microwave oscillation.An X-band device was designed with a theoretical efficiency of 29.4%. The 2.5-D ParticleinCell (PIC) program simulated an efficiency of 28% and the microwave frequency 9 · 42GHz, microwave output power of 2.25GW.