同轴虚阴极微波输出模式分析
Mode analysis of output microwave for coaxial vircator oscillator
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摘要: 对不同透过率的阳极网进行实验研究,得到了主频为3.4 GHz和3.7 GHz的辐射微波,对同轴虚阴极内的电子束分布进行了分析。对同轴虚阴极内的本征模式进行了计算,并与实验结果进行比较。实验结果表明:网内电子束的分布对微波输出模式有重要影响;同轴虚阴极微波频率是阴阳极间距及谐振腔共同作用的结果;阳极网透过率对频率有显著影响,透过率越高,则微波频率相应提高。Abstract: The microwave frequency of the coaxial vircator oscillator were 3.4 GHz and 3.7 GHz using different filtration efficienty of the anode mesh. Based on the experimental results, the beam distribution in the coaxial virtual cathode was analyzed. The eigenmode of the coaxial virtual cathode was calculated using resonance cavity theory, and the results were compared with the experimental ones. The conclusion is that the distribution the beam in the mesh has important effect on the output microwave mode. The output microwave frequency is the result of the interaction between the resonance cavity and the cathodeanode gap. The filtrate of the anode mesh also has important effect on the frequency, the filtration efficiency increase, the microwave frequency increased correspondingly.
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