0.34 THz双注高次模折叠波导行波管高频系统设计

赵征远; 刘文鑫; 杨龙龙; 欧粤

doi:10.11884/HPLPB202133.210002

0.34 THz双注高次模折叠波导行波管高频系统设计

doi: 10.11884/HPLPB202133.210002

赵征远^{1, 2,},
刘文鑫^{1, 2, ,},
杨龙龙^{1, 2},
欧粤^{1, 2}

1.
中国科学院大学，北京 100039
2.
中国科学院空天信息创新研究院，北京 100094

基金项目: 国家重点研发计划项目（20119YFA0210201）；国家自然科学基金项目（U1832193，61831101）

详细信息

作者简介:
赵征远（1996—），男，在读硕士研究生，从事太赫兹折叠波导行波管研究

通讯作者:
刘文鑫（1976—），男，研究员，从事太赫兹真空器件研究

中图分类号: TN124
计量
- 文章访问数: 1043
- HTML全文浏览量: 343
- PDF下载量: 58
- 被引次数: 0
出版历程
- 收稿日期: 2021-01-04
- 修回日期: 2021-03-28
- 网络出版日期: 2021-04-16
- 刊出日期: 2021-05-20

Design of high frequency system of 0.34 THz high order mode two-beam folded waveguide traveling wave tube

Zhao Zhengyuan^{1, 2
,},
Liu Wenxin^{1, 2
, ,},
Yang Longlong^{1, 2},
Ou Yue^{1, 2}

1.
University of Chinese Academy of Sciences, Beijing 100039, China
2.
Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China

摘要

摘要: 高频系统是行波管的核心部件，它会直接影响行波管的工作频率、带宽、增益等性能指标。为了获得更大的输出功率和更高的增益，对0.34 THz双注高次模折叠波导行波管的基本特性进行了研究，计算了双注折叠波导的色散特性和耦合阻抗，并与仿真结果进行对比，结果显示色散特性随频率升高差距增大，耦合阻抗在高频段匹配较好，并研究了损耗特性。利用CST仿真工作室对双注折叠波导的注波互作用特性进行了仿真，实现41.68 W输出。为了获得更高的输出，通过增大直波导高度，最终使输出功率提高了52.7%，达到63.12 W。最后设计了符合要求的盒型输出窗和模式转换器，验证了高频系统的传输特性。
- 双电子注折叠波导 /
- 慢波结构 /
- 注波互作用 /
- 相速渐变 /
- 输出窗 /
- 模式转换器
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.
- two-beam folded-waveguide /
- slow wave structure /
- beam wave interaction /
- phase-velocity taper /
- output window /
- mode converter

HTML全文

图 1 双电子注折叠波导结构图

Figure 1. Geometry for the TWT with two-beams

下载: 全尺寸图片幻灯片

图 2 场强分布图

Figure 2. Field contour plots for the FW

下载: 全尺寸图片幻灯片

图 3 折叠波导色散特性对比图

Figure 3. Dispersion characteristics of FW

下载: 全尺寸图片幻灯片

图 4 耦合阻抗对比图

Figure 4. Interaction impedance

下载: 全尺寸图片幻灯片

图 5 双注折叠波导CST模型图

Figure 5. Model in CST

下载: 全尺寸图片幻灯片

图 6 双注参数对输出的影响

Figure 6. Output power vary two-beam parameters

下载: 全尺寸图片幻灯片

图 7 输出功率图

Figure 7. Output power

下载: 全尺寸图片幻灯片

图 8 频谱图

Figure 8. Spectra of the signal

下载: 全尺寸图片幻灯片

图 9 输出功率随频率变化图

Figure 9. 3 dB bandwidth

下载: 全尺寸图片幻灯片

图 10 电子轨迹图

Figure 10. Schematic diagram of the electron trajectories

下载: 全尺寸图片幻灯片

图 11 7 ns时电子相空间图

Figure 11. Electronic energy distribution at 7 ns

下载: 全尺寸图片幻灯片

图 12 相速渐变的输出功率

Figure 12. Output power with phase-velocity taper

下载: 全尺寸图片幻灯片

图 13 输出功率随窄边变化

Figure 13. Output power vary narrow side

下载: 全尺寸图片幻灯片

图 14 盒型窗模型图

Figure 14. Model of pill- box window

下载: 全尺寸图片幻灯片

图 15 盒型窗的参数

Figure 15. Parameters of pill-box window

下载: 全尺寸图片幻灯片

图 16 模式转换器模型图

Figure 16. Mode converter

下载: 全尺寸图片幻灯片

图 17 模式转换器的S参数

Figure 17. S parameters of mode converter

下载: 全尺寸图片幻灯片

图 18 高频系统模型图

Figure 18. Mode of high frequency system

下载: 全尺寸图片幻灯片

图 19 高频系统的S参数

Figure 19. S parameters of high frequency system

下载: 全尺寸图片幻灯片

表 1 慢波结构参数

Table 1. Structure parameters of slow wave structure (mm)

a b h p r d

1.12 0.10 0.18 0.22 0.07 0.56

下载: 导出CSV

表 2 盒型窗结构参数

Table 2. Structure parameters of pill-box window (mm)

r₁ r₂ d₁ l₂ A₁ B₁

1.86 1.06 0.10 1.50 0.711 0.355

下载: 导出CSV

参考文献(18)

[1]	Siegel P H. Terahertz technology[J]. IEEE Transactions on Microwave Theory and Techniques, 2002, 50(3): 910-928. doi: 10.1109/22.989974
[2]	Kreischer K E, Tucek J C, Basten M A, et al. 220 GHz power amplifier testing at northrop grumman[C]//2013 IEEE 14th International Vacuum Electronics Conference. 2013.
[3]	Basten M, Tucek J, Gallagher D, et al. A multiple electron beam array for a 220 GHz amplifier[C]//2009 IEEE International Vacuum Electronics Conference. 2009.
[4]	Li Ke, Liu Wenxin, Wang Yong, et al. A nonlinear analysis of the terahertz serpentine waveguide traveling-wave amplifier[J]. Physics of Plasmas, 2015, 22: 043115. doi: 10.1063/1.4917526
[5]	高鹏鹏, 刘文鑫, 张兆传. 双电子注高次模折叠波导慢波结构注波互作用仿真分析[J]. 真空科学与技术学报, 2018, 38(6):465-471. (Gao Pengpeng, Liu Wenxin, Zhang Zhaochuan. Simulation of beam-wave interaction of newly-designed two electron beams higher order mode folded waveguide slow wave structure[J]. Chinese Journal of Vacuum Science and Technology, 2018, 38(6): 465-471
[6]	祝方芳, 刘文鑫. 0.22 THz折叠波导行波管输出窗的仿真设计与实验研究[J]. 真空科学与技术学报, 2017, 37(10):997-1002. (Zhu Fangfang, Liu Wenxin. Design of output window for 0.22 THz folded waveguide travelling wave tube: a simulation and experimental study[J]. Chinese Journal of Vacuum Science and Technology, 2017, 37(10): 997-1002
[7]	高鹏鹏. 太赫兹双电子注折叠波导慢波结构注-波互作用研究[D]. 北京: 中国科学院大学, 2018. Gao Pengpeng. Research on the beam-wave interaction of terahertz two electron beams folded waveguide slow wave structure[D]. Beijing: University of Chinese Academy of Sciences, 2018
[8]	王士龙, 薛谦忠. 220 GHz三注折叠波导慢波电路的设计与仿真[J]. 真空科学与技术学报, 2017, 37(2):206-210. (Wang Shilong, Xue Qianzhong. Design and simulation of 220 GHz three-beam folded waveguide slow-wave circuit[J]. Chinese Journal of Vacuum Science and Technology, 2017, 37(2): 206-210
[9]	Liu Wenxin, Zhang Zhiqiang, Liu Weihao, et al. Demonstration of a high-power and wide-bandwidth G-band traveling wave tube with cascade amplification[J]. IEEE Electron Device Letters, 2021, 42(4): 593-596. doi: 10.1109/LED.2021.3057106
[10]	颜胜美. 多注太赫兹折叠波导行波管技术研究[D]. 绵阳: 中国工程物理研究院, 2015. Yan Shengmei. Research on the technology of multistream Terahertz folded Waveguide TWT[D]. Mianyang: China Academy of Engineering Physics, 2015
[11]	颜胜美, 苏伟, 王亚军, 等. 并行多注THz折叠波导行波管的理论分析与数值模拟[J]. 强激光与粒子束, 2014, 26:083105. (Yan Shengmei, Su Wei, Wang Yajun, et al. Theoretical analysis and numerical simulation of parallel multi-beam THz folded waveguide traveling-wave tube[J]. High Power Laser and Particle Beams, 2014, 26: 083105 doi: 10.11884/HPLPB201426.083105
[12]	徐翱, 周泉丰, 阎磊, 等. 0.34 THz折叠波导行波管设计及流通管实验[J]. 太赫兹科学与电子信息学报, 2014, 12(2):153-157. (Xu Ao, Zhou Quanfeng, Yan Lei, et al. Design of 0.34 THz folded Waveguide TWT and runner pipe experiment[J]. Journal of Terahertz Science and Electronic Information Technology, 2014, 12(2): 153-157
[13]	李科. 基于折叠波导慢波结构的双电子注太赫兹辐射源研究[D]. 北京: 中国科学院大学, 2016. Li Ke. Investigation of the terahertz resource bases on two-beam folded waveguide slow wavve structure[D]. Beijing: University of Chinese Academy of Sciences, 2016
[14]	高鹏鹏, 张兆传, 刘文鑫, 等. G波段双注折叠波导行波管的注-波互作用特性[J]. 太赫兹科学与电子信息学报, 2018, 16(4):571-575. (Gao Pengpeng, Zhang Zhaochuan, Liu Wenxin, et al. Beam-wave interaction characteristics of G-band two-beam folded waveguide traveling wave tube[J]. Jouranl of Terahertz Science and Electronic Information Technology, 2018, 16(4): 571-575
[15]	Booske J H, Converse M C, Kory C L, et al. Accurate parametric modeling of folded waveguide circuits for millimeter-wave traveling wave tubes[J]. IEEE Transactions on Electron Devices, 2005, 52(5): 685-694. doi: 10.1109/TED.2005.845798
[16]	张长青, 宫玉彬, 魏彦玉, 等. 亚毫米波折叠波导慢波结构的损耗特性研究[J]. 半导体光电, 2010, 31(6):880-884, 944. (Zhang Changqing, Gong Yubin, Wei Yanyu, et al. Investigation on loss characteristics of the sub-millimeter wave folded waveguide slow-wave circuit[J]. Semiconductor Optoelectronics, 2010, 31(6): 880-884, 944
[17]	樊孝年, 邬显平. 螺旋线慢波结构损耗特性研究[J]. 真空电子技术, 2000(3):1-9. (Fan Xiaonian, Wu Xianping. The study on the loss characteristics of helical slow wave structure[J]. Vacuum Electronics, 2000(3): 1-9
[18]	廖华. 太赫兹双注过模折叠波导慢波结构的注-波互作用研究[D]. 北京: 中国科学院大学, 2017. Liao Hua. Investigation of the internation of beam-wave based on two-beams overmoded folded waveguide slow wave structure[D]. Beijing: University of Chinese Academy of Sciences, 2017