118GHz高功率回旋管准光模式变换器的设计

A Design of 118GHz High Power Gyroscope Quasi-Optical Mode Converter

本文设计了一种应用于高功率回旋管中的准光模式变换器。该模式变换器的工作频率为118GHz,工作模式为TE22,6模。通过编写程序对螺旋波纹波导辐射器进行了参数优化与数值仿真计算,获得了辐射器辐射口径上的标量模式纯度和矢量模式纯度分别为97.8%和95.6%;对准光模式变换器镜面系统进行了设计,给出了镜面系统的参数,输出窗处的高斯模式纯度达到了95.08%;整个准光模式变换器的模式变换效率为89.51%,功率传输效率为94.96%。

This paper designs a quasi-light mode converter for high power gyrotron. The operating frequency of the mode converter is 118 GHz, the working mode is TE22, 6. The scalar mode purity and vector mode purity on the launcher aperture are 97.8% and 95.6%,respectively, by means of parameter optimization and numerical simulation of the helical corrugated waveguide radiator. The efficiency of the Gaussian mode at the output window is 95.08%. The mode conversion efficiency of the entire quasi-optical mode converter is 89.51%, and the power transmission efficiency is 94.96%.