螺旋带色散特性和耦合阻抗的精确计算

肖刘; 苏小保; 刘濮鲲

doi:10.3724/SP.J.1146.2005.00957

螺旋带色散特性和耦合阻抗的精确计算

doi: 10.3724/SP.J.1146.2005.00957

基金项目:

国家自然科学基金(60571039)和国家杰出青年科学基金(60125104)资助课题

计量
- 文章访问数: 3049
- HTML全文浏览量: 92
- PDF下载量: 653
- 被引次数: 0
出版历程
- 收稿日期: 2005-08-01
- 修回日期: 2006-01-11
- 刊出日期: 2007-03-19

Precise Calculation of the Dispersion and Coupling Impedance of Tape Helix

摘要

摘要: 应用一种改进的计算螺旋带色散和耦合阻抗的方法，对面电流密度进行Chebyshev多项式展开后,去除了螺旋带上的面电流密度假设。在介质的高阶径向分层时为了避免高阶矩阵的求逆运算，采用转移矩阵和连接矩阵处理边界的场匹配。编写可径向任意分层的普适性程序，计算了螺旋线行波管的一些典型结构。研究表明：该理论的计算结果与实验结果有很好的一致；谐波次数以及面电流Chebyshev展开的项数完全可以依据结果的收敛性进行选取；分层的数目主要与结构的径向规则程度有关，径向越不规则，所要求的分层数目越多。
- 行波管;螺旋带;色散;耦合阻抗;介质分层
Abstract: An improved method for evaluating the dispersion and coupling impedance of a tape helix is utilized. The assumption about the surface current density distribution on the tape is avoided by expanding it in a series of Chebyshev polynomials. The propagation matrix and jump matrix are introduced when the dielectric layer is stratified. A program has been written to analyze some typical examples. It is found that the results obtained by computing and measuring agree to good accuracy. The maximal orders of spatial harmonic and Chebyshev expansion can be specified to ensure the convergence of the results. The number of the stratified dielectric depends on the degree of radial uniformity: the more uniform the dielectric, the less the number.

HTML全文

参考文献(1)

[1] Kartikeyan M V, Sinha A K, and Bandopadhyay H N, et al.. Effective simulation of the radial thickness of helix for broad band, practical TWT's [J].IEEE Trans. on Plasma Science.1999, 27(4):1115- [2] Pierce J R. Traveling Wave Tubes [M]. Princeton Nj: Van Nostrand, 1950: 1949. [3] Freund H P, Zaidman E G, and Antonsen Jr T M. Theory of helix traveling wave tubes with dielectric and vane loading [J].Physics of Plasmas.1996, 3(8):3145- [4] Paul G. Quasi-three-dimensional perturbation technique, including dielectrics for TWT's [J].IEEE Trans. on Electron Devices.1994, 41(3):445- [5] Sensiper S．E1ectromagnetic wave propagation on helical conductors[D]. USA, Dept of E1ectrical Engineering, MIT，1951. [6] Freund H P. Three-dimensional nonlinear theory of helix traveling-wave tubes[J].IEEE Trans. on Plasma Science.2000, 28(3):748- [7] Paul G. Tape helix perturbation including 3-D dielectrics for TWTs[J].IEEE Trans. on Electron Devices.2001, 48(1):12- [8] Chernin D, Antonsen Jr T M, and Levush B. Exact treatment of the dispersion and beam interaction impedance of a thin tape helix surrounded by a radially stratified dielectric [J].IEEE Trans. on Electron Devices.1999, 46(7):1472-1483 [9] Jain P K and Basu B N. The inhomogeneous dielectric loading effects of practical helix supports on the interaction impedance of the slow-wave structure of a TWT[J].IEEE Trans. on Electron Devices.1992, 39(3):727- [10] D'Agostino S, Emma F, and Paoloni C. Accurate analysis of helix slow-wave structures [J].IEEE Trans. on Electron Devices.1998, 45(7):1605- [11] 段兆云，宫玉彬，王文祥等. 考虑螺旋带径向厚度的螺旋线慢波系统的研究. 强激光与粒子束, 2002, 14(6): 905910. Duan Zhao-yun, Gong Yu-bin, and Wang Wen-xiang, et al.. Study of helix slow wave structure taking the radial thickness into account. High Power Laser and Particle Beams, 2002, 14(6): 905910. [12] 段兆云，宫玉彬，王文祥等. 一种具有新型分立介质支撑的翼片加载螺旋带慢波结构的研究. 电子学报, 2004, 32(9): 15151519. Duan Zhao-yun, Gong Yu-bin, and Wang Wen-xiang, et al.. Study of vane-loaded tape helix slow wave structure with novel discontinuous supporting dielectric pillars. Acta Electronica Sinica, 2004, 32(9): 15151519.

施引文献

资源附件(0)

访问统计