ZHANG Jinling, YANG Jinsheng, ZHANG Hongxin, “Second Harmonic Suppression for Broadband Helix Traveling-Wave Tubes Using the Phase Velocity Variation of Output Circuit,” Chinese Journal of Electronics, vol. 25, no. 3, pp. 577-582, 2016, doi: 10.1049/cje.2016.05.026
Citation: ZHANG Jinling, YANG Jinsheng, ZHANG Hongxin, “Second Harmonic Suppression for Broadband Helix Traveling-Wave Tubes Using the Phase Velocity Variation of Output Circuit,” Chinese Journal of Electronics, vol. 25, no. 3, pp. 577-582, 2016, doi: 10.1049/cje.2016.05.026

Second Harmonic Suppression for Broadband Helix Traveling-Wave Tubes Using the Phase Velocity Variation of Output Circuit

doi: 10.1049/cje.2016.05.026
Funds:  This work is supported by National Natural Science Foundation of China (No.61171051, No.60771060).
  • Received Date: 2014-05-05
  • Rev Recd Date: 2014-09-05
  • Publish Date: 2016-05-10
  • Based on the principle of phase velocity tapering or stepping output circuit, using the phase velocity variation of the output circuit, four kinds of nonuniform output circuit models have been presented in broadband helix Traveling-wave tubes (TWTs). Taking an example of 6-18GHz, 100W broadband helix TWT and using the improved one-dimensional large signal program, second harmonic suppression performances have been studied by calculating the quantitative relationship between fundamental efficiency, second harmonic output power, and the stepping (tapering) position and strength of phase velocity variation for the four kinds of nonuniform output circuits. From the research results of backward wave and second harmonic suppression feature in two kinds of nonuniform output circuits, we obtained the design principle of phase velocity stepping or tapering, which could suppress the Backward wave oscillation (BWO) and reduce the output power of second harmonic for broadband high-power helix TWTs.
  • loading
  • J. Harper, "Circuit velocity step taper for suppression of backward-wave oscillation in electron interaction devices", Patent, 3761760, U.S., 1973.
    A.R. Jung, "10kW and up from helix t.w.t", IEEE Int. Conf. International Electronic Devices Meeting (IEDM), 24th Technical Digest, Washington USA, pp.530-533, 1978.
    B. Epsztein and G. Kantorowicz, "Suppression of backwardwave oscillations in multikilowatt helix TWT's", European Microwave Conf., Brussels, Belgium, pp.1-4, 1973.
    C. Hagstrom and O. Nilsson, "Start oscillation currents in tapered BWO's", European Microwave Conf., Brussels, Belgium, pp.1-4, 1973.
    Y.L. Hu, Z.H. Yang, J.Q. Li and B. Li, "Backward-wave oscillation suppression in high-power broadband helix traveling-wave tubes", IEEE Trans. Electron Devices, Vol.58, No.5, pp.1562- 1569, 2011.
    B.N. Basu, Electromagnetic Theory and Applications in Beam- Wave Electronics, World Scientific Singapore, 1996.
    J.L. Zhang, Y.H. Lu and J.S. Yang, "Backward wave suppression for broadband helix traveling-wave tubes using the phase velocity variation of output circuit", IEEE Trans. Electron Devices, Vol.59, No.8, pp.2263-2267, 2012.
    J.S. Yang, Q.Y. Chen and J.L. Zhang, "Improve TWT backward wave start-up current", Acta Electronica Sinica, Vol.28, No.12, pp.102-104, 2000. (in Chinese)
    T.K. Ghosh, A.J. Challis and A. Jacob, D. Bowler and R.G. Carter, "Improvements in performance of broadband helix traveling-wave tubes" , IEEE Trans. Electron Devices, Vol.55, No.2, pp.668-673, 2008.
    R.W. Gerchberg and K.B. Niclas, "The positively tapered traveling-wave tube", IEEE Trans. Electron Devices, Vol.16, No.9, pp.827-828, 1969.
    S.S. Jung, A.V. Soukhov, B. Jia, G.S. Park and B.N. Basu, "Efficiency enhancement and harmonic reduction of wideband helix traveling-wave tubes with positive phase velocity tapering", Appl. Phys., Vol.41, No.6A, pp.4007-4013, 2002.
    T.K. Ghosh, A.J. Challis, A Tokeley, K. Rushbrook, I. Poston, R. Matthews, A. Jacob and D. Bowler, "Improvements in broadband performance of mini-TWTs at e2v technologies", Proc. Int. Vac. Electron. Conf., Kitakyushu, Japan, pp.31-32, 2007.
    T.K. Ghosh, Design of Positive Taper for 2nd Generation Mini- TWTs, e2v Technologies, Chelmsford, U.K., 2006.
    V. Srivastava and S.N. Joshi, "Improved nonlinear model for multisignal analysis of helix TWTs", Microwaves Antennas & Propagation lee Proceeding H, Vol.139, No.2, pp.129-134, 1992.
    J.E. Rowe, Nonlinear Electron Wave Interaction Phenomena, Academic press, New York, 1965.
    V. Srivastava, R.G. Carter, B. Ravinder, A.K. Sinha and S.N. Joshi, "Design of helix slow-wave structures for high effciency TWTs", IEEE Trans. Electron Devices, Vol.47, No.12, pp.2438-2443, 2000.
    S.L. Zhao, Research on dispersion shaping and harmonic suppression of CW broadband high gower TWTs, Acta Electronica Sinica, Vol.27, No.3, pp.113-115, 1999. (in Chinese)
    J.X. Qiu, D.K. Abe, T.M. Antonsen, B.G. Danly and B. Levush, "Traveling-wave tube amplifier performance evaluation and design optimization for applications in digital communications with multilevel modulations", IEEE Trans. Microwave Theory and Techniques, Vol.51, No.8, pp.1911-1919, 2003.
    P.N. Safier, V. Dronov, T.M. Antonsen, J.X. Qiu, B.G. Danly and B. Levush, "From frequency-domain physics-based simulation to time-domain modeling of traveling-wave tube amplifiers for high data-rate communication applications", IEEE Trans. Microwave Theory and Techniques, Vol.54, No.10, pp.3605- 3615, 2006.
    M.K. Alaria, A. Bera, R.K. Sharma and V. Srivastava, "Design and development of helix slow-wave structure for ku-band TWT", IEEE Trans. Plasma Science, Vol.39, No.1, 2011.
  • 加载中

Catalog

    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索

    Article Metrics

    Article views (594) PDF downloads(579) Cited by()
    Proportional views
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return