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| The Emission Model of Secondary Electron in Multistage Depressed Collector CAD |
| Huang Tao; Yang Zhong-ha; Jin Yong-bing; Jin Xiao-lin; Hu Quan; Qin Yu-kun |
| School of Physical Electronics, Univ. of Elec. Sci. and Tech. of China, Chengdu 610054, China |
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Abstract The Multistage Depressed Collector (MDC) is widely used to improve the efficiency of microwave amplifiers. The emission of secondary electron in MDC has important influence on the efficiency. In this paper, the emission models of true secondary electron, elastic and inelastic reflected electron are discussed, and the corresponding emission ratio, angle and energy distribution are deeply analyzed. Moreover, the convergence criteria in MDC simulation is discussed, when the secondary electron are considered. The results of the analysis and discussion are used in the CAD software about MDC design, and the effects of secondary electron on the efficiency of MDC are quantitatively analyzed.
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Received: 09 November 2006
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2008, Vol. 30 
