一种新型的高功率高频率同轴渡越时间振荡器
A novel high power and high frequency coaxial transittime oscillator
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摘要: 提出了一种高频率和高功率的渡越时间振荡器,并且对其进行了理论和数值研究。这种振荡器采用同轴结构,功率容量大,不需要外加引导磁场聚焦电子束,波束相互作用区短,保持了传统渡越时间振荡器在结构上的简单性和输出信号的稳定性;运用电压为225kV和电流为11kA的电子束进行模拟,在X波段获得了峰值功率为1.4GW,频率为8.335GHz的微波输出。Abstract: A new structure of high power and high frequency microwave oscillator based on the transittime instability is proposed and studied numerically in this paper. Due to its coaxial structure with large radius, the oscillator allows larger input and output power and can work at higher frequency. Without external magnetic field being used for beam focusing, it keeps the simplicity of a conventional transittime oscillator. Using an electron beam of 225kV and 11kA, a stable and monochromatic output with peak power of 1.4GW is achieved by simulation at 8.335GHz with an rms efficiency of 28%.
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Key words:
- coaxial structure /
- transittime oscillator /
- numerical simulation /
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