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在本课题组此前采用显式方法设计0.14THz宽带折叠波导慢波结构的基础上,设计了一种0.14THz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0.14THz、输入功率为20mW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 the design of 0.14THz broadband folded waveguide slow-wave structure by our group in the past, an 0.14THz watt-order output folded waveguide traveling wave tube was designed. The CST MWS software was used to analyze the influence of structure size on the cold measurement characteristics to determine a set of slow-wave structure parameters. Then design the electron gun, permanent-magnet focusing system, input-output structure, attenuation structure and collector system. Finally, The whole pipe thermal simulation characteristics simulation. This process continues to iteration, finally found a set of structural parameters to meet the frequency of 0.14THz, the input power of 20mW, folded waveguide traveling wave tube output power greater than 6W. In order to verify the correctness of the designed electro-optical system, a flow tube was machined and assembled, and the flow-through rate was measured. The flow-through rate was measured to be greater than 80%.