{"title":"0.34 THz高阶模双波束折叠行波管高频系统设计","authors":"Zhao Zhengyuan, L. Wenxin, Yan Longlong, Ou Yue","doi":"10.11884/HPLPB202133.210002","DOIUrl":null,"url":null,"abstract":"High frequency system is the key part of folded-waveguide (FW) traveling-wave tube (TWT), it will directly affect the operating frequency, bandwidth, gain and other indicators of TWT. In order to obtain larger output power and higher gain than a conventional single-beam FWTWT, the basic characteristics of the 0.34 THz high order mode two-beam FWTWT are studied. Firstly, the dispersion characteristics and interaction impedance of two-beam FW are calculated and compared with the results of simulation. The results show that the theory of dispersion characteristics is consistent with the simulation results and the interaction impedance matches well in high frequency band. CST studio suite is used to simulate the beam-wave interaction of the two-beam FW, and the output power is 41.68 W. In order to obtain high output, the height of the straight is increased. And the 63.12 W output is obtained with an increase of 52.7%. High frequency system is constituted by mode converter and output window structure, and good transmission characteristics are obtained within 25 GHz bandwidth. In the operating bandwidth, |S11| is greater than 15 dB, |S21| is less than 4.5 dB.","PeriodicalId":39871,"journal":{"name":"强激光与粒子束","volume":"33 1","pages":"053004-1-053004-8"},"PeriodicalIF":0.0000,"publicationDate":"2021-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Design of high frequency system of 0.34 THz high order mode two-beam folded waveguide traveling wave tube\",\"authors\":\"Zhao Zhengyuan, L. Wenxin, Yan Longlong, Ou Yue\",\"doi\":\"10.11884/HPLPB202133.210002\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"High frequency system is the key part of folded-waveguide (FW) traveling-wave tube (TWT), it will directly affect the operating frequency, bandwidth, gain and other indicators of TWT. In order to obtain larger output power and higher gain than a conventional single-beam FWTWT, the basic characteristics of the 0.34 THz high order mode two-beam FWTWT are studied. Firstly, the dispersion characteristics and interaction impedance of two-beam FW are calculated and compared with the results of simulation. The results show that the theory of dispersion characteristics is consistent with the simulation results and the interaction impedance matches well in high frequency band. CST studio suite is used to simulate the beam-wave interaction of the two-beam FW, and the output power is 41.68 W. In order to obtain high output, the height of the straight is increased. And the 63.12 W output is obtained with an increase of 52.7%. High frequency system is constituted by mode converter and output window structure, and good transmission characteristics are obtained within 25 GHz bandwidth. In the operating bandwidth, |S11| is greater than 15 dB, |S21| is less than 4.5 dB.\",\"PeriodicalId\":39871,\"journal\":{\"name\":\"强激光与粒子束\",\"volume\":\"33 1\",\"pages\":\"053004-1-053004-8\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2021-05-20\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"强激光与粒子束\",\"FirstCategoryId\":\"1089\",\"ListUrlMain\":\"https://doi.org/10.11884/HPLPB202133.210002\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"Engineering\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"强激光与粒子束","FirstCategoryId":"1089","ListUrlMain":"https://doi.org/10.11884/HPLPB202133.210002","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"Engineering","Score":null,"Total":0}
引用次数: 0
摘要
高频系统是折叠波导行波管的关键部分，它将直接影响到行波管的工作频率、带宽、增益等指标。为了获得比传统单束FWTWT更大的输出功率和更高的增益，对0.34 THz高阶模双束FWTWT的基本特性进行了研究。首先，计算了双波束FW的色散特性和相互作用阻抗，并与仿真结果进行了比较。结果表明，色散特性理论与仿真结果吻合较好，在高频段内相互作用阻抗吻合较好。采用CST studio suite模拟双波束FW的波束波相互作用，输出功率为41.68 W。为了获得高的输出，增加了直管的高度。输出功率为63.12 W，提高了52.7%。高频系统由模式变换器和输出窗结构组成，在25ghz带宽范围内具有良好的传输特性。在工作带宽中，|S11|大于15db， |S21|小于4.5 dB。
Design of high frequency system of 0.34 THz high order mode two-beam folded waveguide traveling wave tube
High frequency system is the key part of folded-waveguide (FW) traveling-wave tube (TWT), it will directly affect the operating frequency, bandwidth, gain and other indicators of TWT. In order to obtain larger output power and higher gain than a conventional single-beam FWTWT, the basic characteristics of the 0.34 THz high order mode two-beam FWTWT are studied. Firstly, the dispersion characteristics and interaction impedance of two-beam FW are calculated and compared with the results of simulation. The results show that the theory of dispersion characteristics is consistent with the simulation results and the interaction impedance matches well in high frequency band. CST studio suite is used to simulate the beam-wave interaction of the two-beam FW, and the output power is 41.68 W. In order to obtain high output, the height of the straight is increased. And the 63.12 W output is obtained with an increase of 52.7%. High frequency system is constituted by mode converter and output window structure, and good transmission characteristics are obtained within 25 GHz bandwidth. In the operating bandwidth, |S11| is greater than 15 dB, |S21| is less than 4.5 dB.
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