0.14 THz瓦量级折叠波导行波管设计

摘要

在本课题组此前采用显式方法设计0.14 THz宽带折叠波导慢波结构的基础上,设计了一种0.14 THz瓦量级输出折叠波导行波管.通过CST MWS软件分析结构尺寸对冷测特性的影响规律来确定一组慢波结构参数,然后对电子枪、永磁聚焦系统、输入输出结构、衰减结构及收集极系统进行设计,最后经过CST PS软件进行整管热测特性仿真模拟.此过程不断迭代,最终找到一组结构参数满足频率在0.14 THz、输入功率为20 mW时,折叠波导行波管输出功率大于6W.为了验证设计的电子光学系统的正确性,加工装配了一根流通管,并进行了流通率测试,测得流通率大于80％.%Based on our previous work which introduced an explicit method to design the slow wave circuit of a 0.14 THz broadband folded waveguide traveling wave tube,a 0.14 THz watt-level folded waveguide traveling wave tube has been designed,with a set of slow wave structure parameters determined by analyzing the influence of structure dimensions on its cold characteristics using CST MWS.Over 6 W output power is attained with 3D PIC method by means of CST PS,at around 0.14 THz,as the input power is 20 mW.A transmission tube was fabricated in order to verify the designed electron-optical system.Measurement results show an over 80 ％ electron transmission rate.