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| Three-dimensional Finite-element Analysis of Conductivity and Dielectric Attenuation in Arbitrary Slow-wave Structure of Traveling-wave Tubes |
| Xu Li Yang Zhong-hai Li Jian-qing Li Bin |
| National Key Laboratory of Science and Technology on Vacuum Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China |
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Abstract This paper presents a novel 3-D finite-element analysis method for arbitrary lossy Slow-Wave Structure (SWS) of the traveling-wave tube. In this analysis method, a new Frequency-Specified Eigenmode Analysis (FSEA) for SWSs is proposed and utilized. Unlike the traditional phase-advance-specified eigenmode analysis for SWSs which has to solve a nonlinear Generalized Eigenvalue Problem (GEP), the new FSEA approach only needs solving a linear GEP and is capable of obtaining the attenuation constant more accurately and directly without any post-processing when simulating the lossy SWSs.
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Received: 19 December 2011
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Corresponding Authors:
Li Bin
E-mail: libin@uestc.edu.cn
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2012, Vol. 34 
