Purpose Flexible waveguides,which allow for greater deformation as compared to traditional hard waveguides,are highly useful for simplifying waveguide system assemblies.However,the peak powers of these waveguides have...Purpose Flexible waveguides,which allow for greater deformation as compared to traditional hard waveguides,are highly useful for simplifying waveguide system assemblies.However,the peak powers of these waveguides have been limited to several megawatts in non-vacuum environments.Herein,a novel flexible waveguide was developed for the S-band(2856 MHz)with the aim of facilitating the interconnection of two hard waveguides.Methods The flexible waveguide was composed of brass,and its surface was plated with oxygen-free high-conductivity copper for brazing with stainless steel flanges in a vacuum furnace.By connecting the stainless steel flanges together,it can be applied to a high-vacuum environment.Results The prototype exhibited good measurement results in low-power microwave tests;the results of a 72-h vacuum leak test showed satisfactory vacuum performance as well,and no obvious surface collapse was observed.High-power microwave commissioning was conducted between June and July 2019;the waveguide showed a maximum average power of approximately 2.7 kW.Conclusion Unfortunately,the prototype was damaged after reaching that power level,which indicates the need for further optimization of the fabrication process.From our experiment,it is clear that the flexible waveguide cannot be used in large accelerators because of its average power limit.展开更多
基于微小卫星组网编队技术,气象预报工作在时间和空间分辨率方面得到大幅提升.为了完成微小卫星大气微波探测仪射频部分的频率分离功能,采用体积小、插损小的波导双工器来实现.采用等效电路法和模式匹配法优化参数,设计了一款166/183 GH...基于微小卫星组网编队技术,气象预报工作在时间和空间分辨率方面得到大幅提升.为了完成微小卫星大气微波探测仪射频部分的频率分离功能,采用体积小、插损小的波导双工器来实现.采用等效电路法和模式匹配法优化参数,设计了一款166/183 GHz双工器.考虑到实际加工情况,仿真过程中具体分析了膜片陡直度和膜片厚度对双工器性能的影响.加工过程中,通过对器件分割方式和加工缺陷的分析,不断优化加工方案,最终得到满意的加工样品.经测试,166/183 GHz双工器的带内插损小于1. 5 d B,回波损耗大于15 d B,带外抑制高于27 d B以上,仿真结果与实测结果相吻合,证明了双工器设计方法的可行性.展开更多
基金Funded by Youth Innovation Promotion Association CAS(2020015).
文摘Purpose Flexible waveguides,which allow for greater deformation as compared to traditional hard waveguides,are highly useful for simplifying waveguide system assemblies.However,the peak powers of these waveguides have been limited to several megawatts in non-vacuum environments.Herein,a novel flexible waveguide was developed for the S-band(2856 MHz)with the aim of facilitating the interconnection of two hard waveguides.Methods The flexible waveguide was composed of brass,and its surface was plated with oxygen-free high-conductivity copper for brazing with stainless steel flanges in a vacuum furnace.By connecting the stainless steel flanges together,it can be applied to a high-vacuum environment.Results The prototype exhibited good measurement results in low-power microwave tests;the results of a 72-h vacuum leak test showed satisfactory vacuum performance as well,and no obvious surface collapse was observed.High-power microwave commissioning was conducted between June and July 2019;the waveguide showed a maximum average power of approximately 2.7 kW.Conclusion Unfortunately,the prototype was damaged after reaching that power level,which indicates the need for further optimization of the fabrication process.From our experiment,it is clear that the flexible waveguide cannot be used in large accelerators because of its average power limit.
文摘基于微小卫星组网编队技术,气象预报工作在时间和空间分辨率方面得到大幅提升.为了完成微小卫星大气微波探测仪射频部分的频率分离功能,采用体积小、插损小的波导双工器来实现.采用等效电路法和模式匹配法优化参数,设计了一款166/183 GHz双工器.考虑到实际加工情况,仿真过程中具体分析了膜片陡直度和膜片厚度对双工器性能的影响.加工过程中,通过对器件分割方式和加工缺陷的分析,不断优化加工方案,最终得到满意的加工样品.经测试,166/183 GHz双工器的带内插损小于1. 5 d B,回波损耗大于15 d B,带外抑制高于27 d B以上,仿真结果与实测结果相吻合,证明了双工器设计方法的可行性.
