Design of 0.14 THz watt-level folded waveguide traveling wave tube
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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6 W。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%。Abstract: 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.
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Key words:
- folded waveguide /
- traveling wave tubes /
- slow wave structure /
- terahertz
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