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Chin. Phys. B, 2016, Vol. 25(4): 048402    DOI: 10.1088/1674-1056/25/4/048402
INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY Prev   Next  

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)
College of Electronics and Information Engineering, Sichuan University, Chengdu 610065, China
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.
Keywords:  self-injection magnetron      frequency and power decoupling      feedback loop      noise reduction  
Received:  09 September 2015      Revised:  21 December 2015      Accepted manuscript online: 
PACS:  84.40.Fe (Microwave tubes (e.g., klystrons, magnetrons, traveling-wave, backward-wave tubes, etc.))  
  85.40.Qx (Microcircuit quality, noise, performance, and failure analysis)  
  88.80.hp (Radio-frequency power transmission)  
Fund: Project supported by the National Basic Research Program of China (Grant No. 2013CB328902) and the National Natural Science Foundation of China (Grant No. 61501311).
Corresponding Authors:  Yang Yang     E-mail:  yyang@scu.edu.cn

Cite this article: 

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) Analysis and experiments of self-injection magnetron 2016 Chin. Phys. B 25 048402

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