W波段TE62-TEM00准光模式变换器
W-band quasi-optical TE62-TEM00 mode converter
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摘要: 对准光模式变换器的基本理论和设计方法进行了讨论。以改进型等效电流理论为基础给出了Vlasov辐射器的分析方法，建立了数值模型，并进行了计算分析。继而推导了自适应相位修正Katsenelenbaum-Semenov算法，编制了相位修正反射镜自适应设计分析程序。在上述理论工作的基础上，针对3 mm波段TE62至TEM00准光模式变换器开展优化设计，得到了Vlasov辐射器、相位修正反射镜的相关参数,并完成了实验样品的加工和相关实验测试。结果表明:输出模式纯度大于94%，测试结果与理论计算具有良好的一致性。Abstract: The analysis code for quasi-optical mode converter is developed based on the theory of vector diffraction and the self-adapted Katsenelenbaum-Semenov algorithm for phase correcting. A 3 mm-band quasi-optical mode converter (TE62 to TEM00) is then optimized, and corresponding parameters of its components, i.e. Vlasov radiator and phase correcting mirror, are obtained. A sample is fabricated accordingly, and tests are conducted. The theoretical results show that the output mode purity of the converter is larger than 94%. The experimental results agree well with the theoretical ones.
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Key words:
- gyrotron /
- vector diffraction theory /
- mode converter /
- vlasov radiator /
- quasi-optical technique
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