94GHz回旋管准光模式变换器设计

Design of a quasi-optical mode converter for 94 GHz gyrotron

基于几何光学理论和矢量绕射理论,研究了将回旋管及其他高功率微波器件的振荡输出模式转换成准光高斯波束的模式变换器,采用伏拉索夫(Vlasov)辐射器和三级准光反射面实现了准高斯模TEM00的横向输出.研究了Vlasov辐射器的工作机理,运用矢量绕射理论计算出波导辐射场,口面电流分布的方法计算反射面辐射场.通过编写程序设计了将94GHz,模式为TE62的毫米波转化为准光高斯波束的内置式准光模式变换器.

Based on geometry optics theory and vector diffraction theory,mode converter is studied to convert the gyrotron and other high-power microwave oscillator output mode into quasi-optical Gaussian beam,using Vlasov launcher and two quasi-optical reflector achieved quasi-Gaussian mode TEM00 transverse output.The working mechanism of Vlasov launcher in analyzed,the radiation field is calculated by using vector diffraction theory,and the surface radiation field is also calculated by using the surface current distribution method.A built-in quasi-optical mode converter is designed to convert the 94GHz,TE62 model millimeter wave into quasi-optical Gaussian beam through programming.