中国物理B ›› 2016, Vol. 25 ›› Issue (4): 48402-048402.doi: 10.1088/1674-1056/25/4/048402

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

Analysis and experiments of self-injection magnetron

Yi Zhang(张益), Wen-Jun Ye(叶文军), Ping Yuan(袁萍), Huan-Cheng Zhu(朱铧丞), Yang Yang(杨阳), Ka-Ma Huang(黄卡玛)   

  1. College of Electronics and Information Engineering, Sichuan University, Chengdu 610065, China
  • 收稿日期:2015-09-09 修回日期:2015-12-21 出版日期:2016-04-05 发布日期:2016-04-05
  • 通讯作者: Yang Yang E-mail:yyang@scu.edu.cn
  • 基金资助:
    Project supported by the National Basic Research Program of China (Grant No. 2013CB328902) and the National Natural Science Foundation of China (Grant No. 61501311).

Analysis and experiments of self-injection magnetron

Yi Zhang(张益), Wen-Jun Ye(叶文军), Ping Yuan(袁萍), Huan-Cheng Zhu(朱铧丞), Yang Yang(杨阳), Ka-Ma Huang(黄卡玛)   

  1. College of Electronics and Information Engineering, Sichuan University, Chengdu 610065, China
  • Received:2015-09-09 Revised:2015-12-21 Online:2016-04-05 Published:2016-04-05
  • Contact: Yang Yang E-mail:yyang@scu.edu.cn
  • Supported by:
    Project supported by the National Basic Research Program of China (Grant No. 2013CB328902) and the National Natural Science Foundation of China (Grant No. 61501311).

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摘要： Magnetrons are widely used in microwave-based industrial applications, which are rapidly developing. However, the coupling between their output frequency and power as well as their wideband spectra restricts their further application. In this work, the output frequency and power of a magnetron are decoupled by self-injection. Moreover, the spectral bandwidth is narrowed, and the phase noise is reduced for most loop phase values. In order to predict the frequency variation with loop phase and injection ratio, a theoretical model based on a circuit equivalent to the magnetron is developed. Furthermore, the developed model also shows that the self-injection magnetron is stabler than the free-running magnetron and that the magnetron's phase noise can be reduced significantly for most loop phase values. Experimental results confirm the conclusions obtained using the proposed model.

关键词: self-injection magnetron, frequency and power decoupling, feedback loop, noise reduction

Abstract: Magnetrons are widely used in microwave-based industrial applications, which are rapidly developing. However, the coupling between their output frequency and power as well as their wideband spectra restricts their further application. In this work, the output frequency and power of a magnetron are decoupled by self-injection. Moreover, the spectral bandwidth is narrowed, and the phase noise is reduced for most loop phase values. In order to predict the frequency variation with loop phase and injection ratio, a theoretical model based on a circuit equivalent to the magnetron is developed. Furthermore, the developed model also shows that the self-injection magnetron is stabler than the free-running magnetron and that the magnetron's phase noise can be reduced significantly for most loop phase values. Experimental results confirm the conclusions obtained using the proposed model.

Key words: self-injection magnetron, frequency and power decoupling, feedback loop, noise reduction

中图分类号:  (Microwave tubes (e.g., klystrons, magnetrons, traveling-wave, backward-wave tubes, etc.))

  • 84.40.Fe
85.40.Qx (Microcircuit quality, noise, performance, and failure analysis) 88.80.hp (Radio-frequency power transmission)