Application of helix pitch step and magnetic field amplitude step and period step in Ka band traveling-wave tube

Chen Shan; Yue Lingna; Jin Lei; Zhao Guoqing; Wei Yanyu; Wang Wenxiang; Gong Yubin

doi:10.11884/HPLPB201830.180050

Volume 30 Issue 8

Aug. 2018

Turn off MathJax

Article Contents

Article Navigation > High Power Laser and Particle Beams > 2018 > 30(8): 083002

Chen Shan, Yue Lingna, Jin Lei, et al. Application of helix pitch step and magnetic field amplitude step and period step in Ka band traveling-wave tube[J]. High Power Laser and Particle Beams, 2018, 30: 083002. doi: 10.11884/HPLPB201830.180050

Citation:

Chen Shan, Yue Lingna, Jin Lei, et al. Application of helix pitch step and magnetic field amplitude step and period step in Ka band traveling-wave tube[J]. High Power Laser and Particle Beams, 2018, 30: 083002. doi: 10.11884/HPLPB201830.180050

Citation:

PDF( 3547 KB)

Application of helix pitch step and magnetic field amplitude step and period step in Ka band traveling-wave tube

doi: 10.11884/HPLPB201830.180050

School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China

Received Date: 2018-02-05
Rev Recd Date: 2018-04-25
Publish Date: 2018-08-15

Abstract

Abstract

The interaction simulation of the fan-shaped metal-dielectric support rod helix traveling wave tube(TWT) is carried out. On the basis of simple uniform pitch design, the helix pitch step and magnetic field step are used to improve the output power and electronic efficiency of the TWT in the working frequency band, and the problem of electron beam defocusing is solved. The final design results show that, when the working voltage is 9 kV and the working current is 210 mA, the gain of the traveling wave tube in the whole frequency band of 24-40 GHz is between 37.7 dB and 48.7 dB, the electronic efficiency is between 15.18% and 19.42%, and the output power is greater than 286 W. Comparing with the results of the original design, the growth rate increases by more than 4.19% on the electron efficiency, the growth rate of output power is more than 4.3%, especially in the range of 26-37 GHz, the growth rate of electron efficiency increases by more than 11.8%, and the growth rate of output power goes up to 11.9%. The design results are helpful to design improved fan-shaped metal-dielectric support rod for high efficiency broadband millimeter wave helix TWT.
- helix TWT,
- bandwidth,
- output power,
- helix pitch step,
- magnetic step

FullText(HTML)

References(10)

References

[1]	陈波, 崔延军, 陆麒如, 等. Ka波段500 W螺旋线行波管高频结构及互作用研究[J]. 真空电子技术, 2016(4): 13-16. https://www.cnki.com.cn/Article/CJFDTOTAL-ZKDJ201604004.htm Chen Bo, Cui Yanjun, Lu Qiru, et al. Study on high frequency structure and interaction of Ka band 500 W helix traveling wave tube. Vacuum Electronics and Technology, 2016(4): 13-16 https://www.cnki.com.cn/Article/CJFDTOTAL-ZKDJ201604004.htm
[2]	Hao B, Huang M, Wang G, et al. Development of Ka-band space and high power helix TWTs at IECAS[C]//IEEE International Conference on Vacuum Electronics. 2014: 43-44.
[3]	姚若妍, 唐涛, 赵国庆, 等. 螺旋线行波管慢波结构设计及注波互作用模拟[J]. 强激光与粒子束, 2014, 26: 063030. doi: 10.11884/HPLPB201426.063030 Yao Ruoyan, Tang Tao, Zhao Guoqing, et al. Slow wave structure design and beam wave interaction simulation of helix traveling wave tube. High Power Laser and Particle Beams, 2014, 26: 063030 doi: 10.11884/HPLPB201426.063030
[4]	Chong C K, Menninger W L. Latest advancements in high-power millimeter-wave helix TWTs[J]. IEEE Trans Plasma Science, 2010, 38(6): 1227-1238. doi: 10.1109/TPS.2010.2041940
[5]	孙宝成, 郝保良, 黄拓扑, 等. 一种毫米波宽带大功率行波管的研制[J]. 真空电子技术, 2017(2): 29-32. https://www.cnki.com.cn/Article/CJFDTOTAL-ZKDJ201702009.htm Sun Baocheng, Hao Baoliang, Huang Tuopu, et al. Investigation on high power millimeter wave traveling wave tube with bandwidth. Vacuum Electronics and Technology, 2017(2): 29-32 https://www.cnki.com.cn/Article/CJFDTOTAL-ZKDJ201702009.htm
[6]	郝保良, 黄明光, 刘濮鲲, 等. 26.5-40 GHz高效率宽带毫米波行波管高频系统仿真设计[J]. 微波学报, 2010, 26(s1): 442-444. https://www.cnki.com.cn/Article/CJFDTOTAL-WBXB2010S1129.htm Hao Baoliang, Huang Mingguang, Liu Pukun, et al. 26.5-40 GHz high efficiency broadband millimeter wave traveling wave tube high frequency system simulation design. Journal of Microwave, 2010, 26(s1): 442-444 https://www.cnki.com.cn/Article/CJFDTOTAL-WBXB2010S1129.htm
[7]	欧海林, 段兆云, 王彦帅, 等. 超宽带螺旋线行波管的设计[J]. 微波学报, 2014, 30(s1): 234-236. https://www.cnki.com.cn/Article/CJFDTOTAL-WBXB2014S1067.htm Ou Hailin, Duan Zhaoyun, Wang Yanshuai, et al. The design of ultra-wideband helix TWT. Journal of Microwave, 2014, 30(s1): 234-236 https://www.cnki.com.cn/Article/CJFDTOTAL-WBXB2014S1067.htm
[8]	冯晨, 杨明华, 黄拓朴. Ka波段250 W连续波行波管的研制[J]. 真空电子技术, 2011(4): 90-92. https://www.cnki.com.cn/Article/CJFDTOTAL-ZKDJ201104026.htm Feng Chen, Yang Minghua, Huang Tuopu. Investigation of Ka-band CW 250 W TWT. Vacuum Electronics and Technology, 2011(4): 90-92 https://www.cnki.com.cn/Article/CJFDTOTAL-ZKDJ201104026.htm
[9]	杨蕾, 吕国强, 贺兆昌. 电子注在周期永磁聚焦系统中运动状态的计算机模拟[J]. 合肥工业大学学报(自然科学版), 2007(12): 1559-1563. doi: 10.3969/j.issn.1003-5060.2007.12.002 Yang Lei, Lü Guoqiang, He Zhaochang. Computer simulation of the electron beam movement state in periodic permanent magnet fields. Journal of Hefei University of Technology(Natural Science), 2007(12): 1559-1563 doi: 10.3969/j.issn.1003-5060.2007.12.002
[10]	李国超, 刘濮鲲, 肖刘, 等. 周期永磁场作用下的螺旋线行波管非线性返波振荡分析[J]. 真空科学与技术学报, 2009, 29(4): 380-385. https://www.cnki.com.cn/Article/CJFDTOTAL-ZKKX200904010.htm Li Guochao, Liu Pukun, Xiao Liu, et al. Simulation of backward-wave oscillation in helix traveling wave tube under permanent permanent periodic magnetic focusing. Vacuum Electronics and Technology, 2009, 29(4): 380-385 https://www.cnki.com.cn/Article/CJFDTOTAL-ZKKX200904010.htm