强激光与粒子束, 2014, 26 (3): 033002, 网络出版: 2014-03-31   

螺旋坐标系下考虑厚度的螺旋线行波管小信号研究

Small signal analysis of thick helix traveling-wave tube under helical coordinate system
作者单位
淮阴工学院 电子与电气工程学院, 江苏 淮安 223003
摘要
采用螺旋坐标系对有限厚度的螺旋带行波管进行了注波互作用的线性理论分析,利用自洽场理论得出了此结构中引入电子注后的“热”色散方程,数值计算了其小信号增益,分析了电子注参数和螺旋线厚度对于螺旋线慢波系统的色散特性的影响。结果表明:螺旋线厚度的增加,行波管的小信号增益也会增加,且带宽也略有增加。该结论为高增益宽频带的螺旋线行波管放大器的设计提供了理论基础。
Abstract
Properties of traveling wave-beam interaction in a thick helix slow-wave structure (SWS) are investigated for a round electron beam. The “hot” dispersion equation is obtained using the self-consistent field theory, and the small signal analysis is carried out including the effects of the electron beam parameters and the helix’s thickness. The numerical results show that the bandwidth and the small-signal gain of the thick helix traveling wave tube (TWT) increase with the increasing beam current and beam radius; while the beam voltage does not obviously influence the small signal gain. And the small-signal gain increases as the thickness of the helix SWS structure increases, however, the bandwidth broadens a little. The presented analysis will be useful for the design of the high power TWT with thick helix circuit.
参考文献

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付成芳, 朱汉清, 赵波. 螺旋坐标系下考虑厚度的螺旋线行波管小信号研究[J]. 强激光与粒子束, 2014, 26(3): 033002. Fu Chengfang, Zhu Hanqing, Zhao Bo. Small signal analysis of thick helix traveling-wave tube under helical coordinate system[J]. High Power Laser and Particle Beams, 2014, 26(3): 033002.

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