Study on the dispersion characteristics of a five-fold helical corrugated waveguide

Wang Efeng; Wang Zheyuan; Lei Zihan; Li Ning; Zhao Qixiang; Lei Chaojun; Zeng Xu; Feng Jinjun

doi:10.11884/HPLPB202537.250183

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Article Navigation > High Power Laser and Particle Beams > 2025 > Accepted Manuscript

Wang Efeng, Wang Zheyuan, Lei Zihan, et al. Study on the dispersion characteristics of a five-fold helical corrugated waveguide[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202537.250183

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Wang Efeng, Wang Zheyuan, Lei Zihan, et al. Study on the dispersion characteristics of a five-fold helical corrugated waveguide[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202537.250183

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Study on the dispersion characteristics of a five-fold helical corrugated waveguide

doi: 10.11884/HPLPB202537.250183

1.
National Key Laboratory of Science and Technology on Vacuum Electronics, Beijing Vacuum Electronics Research Institute, Beijing 100015, China
2.
School of Aerospace Engineering, , Tsinghua University, Beijing 100084, China
3.
School of Information and Communication, Guilin University of Electronic Technology, Guilin Guangxi 541004, China
4.
School of Police Equipment Technical, China People's Police University, Langfang Hebei 065000, China

Received Date: 2025-06-25
Accepted Date: 2025-07-30
Rev Recd Date: 2025-08-19

Available Online: 2025-09-02

Abstract

Abstract

Gyrotron traveling wave tube (gyro-TWT) hold significant applications in millimeter-wave radar, communications, electronic warfare, and deep-space exploration. For electron beams operating in the large-orbit regime, interaction occurs exclusively with modes satisfying $ s=m $, where s denotes the harmonic number and m represents the azimuthal index of the mode. This selective interaction favors the suppression of mode competition. To investigate the effects of variations in thread fluctuation parameters and thread period on the dispersion characteristics of operating mode 1, this study investigates the dispersion characteristics of a five-fold helical corrugated waveguide operating in the Q-band using the impedance perturbation technique combined with wave coupling theory. The transmission coupling equations are derived, and the mode coupling behavior within the waveguide is systematically characterized. Based on the established coupling model, the dispersion equation is formulated and subsequently solved through numerical methods to obtain the dispersion curves. The analysis reveals the presence of three intrinsic eigenmodes, among which Mode 1 exhibits strong isolation from Modes 2 and 3. Mode 1 is therefore selected as the primary operating mode. Within the 42–47 GHz frequency range, favorable phase synchronism is achieved between Mode 1 and the large-orbit electron beam, enabling broadband beam–wave interaction. This configuration not only substantially enhances the interaction bandwidth but also provides effective suppression of mode competition.
- five-fold helical corrugated waveguide,
- gyro-TWT,
- large orbit electron beams,
- dispersion characteristics,
- mode competition

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References(14)

References

[1]	胡银富, 冯进军. 用于雷达的新型真空电子器件[J]. 雷达学报, 2016, 5(4): 350-360 doi: 10.12000/JR16078 Hu Yinfu, Feng Jinjun. New vacuum electronic devices for radar[J]. Journal of Radars, 2016, 5(4): 350-360 doi: 10.12000/JR16078
[2]	郑新, 刘超, 杨明. 大功率毫米波雷达及器件新技术研究[J]. 微波学报, 2020, 36(1): 62-66 Zheng Xin, Liu Chao, Yang Ming. Research on new technology of high power millimeter wave radar and devices[J]. Journal of Microwaves, 2020, 36(1): 62-66
[3]	Thumm M. History, presence and future of gyrotrons[C]//2009 IEEE International Vacuum Electronics Conference. 2009: 37-40.
[4]	Yang Jintao, Wang Efeng, Lei Chaojun, et al. Research on a Ka-band large-orbit gyro-TWT with periodic dielectric-loaded structure[J]. Electronics Letters, 2024, 60: e13068. doi: 10.1049/ell2.13068
[5]	杨锦涛. Ka波段大回旋电子注周期性介质加载结构回旋行波管研究[D]. 北京: 中国电子科技集团公司电子科学研究院, 2024 Yang Jintao. Research on a a Ka-band large-orbit gyro-TWT with periodic dielectric-loaded structure[D]. Beijing: Institute of Electronic Science and Technology of China Electronics Technology Group Corporation, 2024
[6]	Lei Z, Wang E, Yang J, et al. The comparative study of Gyro-TWT in large-orbit and small-orbit at second harmonic at Ka-band[C]//2024 IEEE International Conference on Plasma Science (ICOPS). 2024: 1.
[7]	Denisov G G, Bratman V L, Phelps A D R, et al. Gyro-TWT with a Helical operating waveguide: new possibilities to enhance efficiency and frequency bandwidth[C]//Proc. 21st Int Con infrared and Millimeter Waves. 1997: 289-290.
[8]	Denisov G G, Bratman V L, Cross A W, et al. Gyrotron traveling wave amplifier with a helical interaction waveguide[J]. Physical Review Letters, 1998, 81(25): 5680-5683. doi: 10.1103/PhysRevLett.81.5680
[9]	王峨锋. 螺旋波纹波导回旋行波管[D]. 成都: 电子科技大学, 2006 Wang Efeng. Gyrotron traveling wave tube amplifier with the helical wave guide[D]. Chengdu: University of Electronic Science and Technology, 2006
[10]	黄宏嘉. 微波原理(卷Ⅰ)[M]. 北京: 科学出版社, 1963: 69-110 Huang Hongjia. Microwave principles (Volume I)[M]. Beijing: Science Press, 1963: 69-110
[11]	王峨锋, 李宏福, 李浩, 等. 螺旋波纹波导研究[J]. 物理学报, 2005, 54(11): 5339-5343 doi: 10.3321/j.issn:1000-3290.2005.11.061 Wang Efeng, Li Hongfu, Li Hao, et al. Study of the helical wave-guide[J]. Acta Physica Sinica, 2005, 54(11): 5339-5343 doi: 10.3321/j.issn:1000-3290.2005.11.061
[12]	钱景仁. 缓变参数不规则波导理论的补充及其应用[J]. 电子学报, 1963(1): 43-50 Qian Jingren. Supplement to the theory of slow-varying number of irregular waveguides and its applications[J]. Acta Electronica Sinica, 1963(1): 43-50
[13]	钱景仁, 来芒, 黄宏嘉. 阻抗微扰概念在计算中继圆波导不规则性中的应用[J]. 电子学报, 1965(1): 67-72 Qian Jingren, Lai Mang, Huang Hongjia. The concept of impedance-perturbation as applied to geometrical imperfections in circular waveguides in radio relay system[J]. Acta Electronica Sinica, 1965(1): 67-72
[14]	王哲远. Q波段无超导五折叠螺旋波纹波导回旋行波管研究[D]. 2022 Wang Zheyuan. Q-band superconductivity-free five-fold spiral corrugated waveguide rotary traveling wave tube[D]. 2022