传输矩阵法在行波管内部反射引起的增益波动计算中的应用

发布时间：2018-05-12 12:41

本文选题：传输矩阵法 + 小信号增益　；参考：《物理学报》2016年12期

【摘要】：本文分析了由于行波管慢波结构制造误差引入的多个不连续点对小信号增益的影响.行波管内部反射对增益波动的影响,须采用考虑反射波的四阶模型进行分析,用传输矩阵法对节点处的自左至右入射和自右至左入射两种散射类型建立传输矩阵,研究在不同空间电荷参量下,慢波电路的单个反射节点以及慢波电路的皮尔斯速度参量b和增益参量C的多个随机分布不连续性对行波管小信号增益的影响,计算结果与Chernin模型具有很好的一致性.并以G波段行波管为例分析了慢波结构周期长度分布有两个不连续点和周期长度的多个随机分布不连续性带来的小信号增益波动.结果表明,制造误差越大,周期长度分布的两个不连续点相距越远,小信号增益波动越大,多个小的不连续性可以引起较大的增益波动.
[Abstract]:In this paper, the influence of several discontinuous points on the small signal gain caused by the manufacturing error of the slow-wave structure of TWT is analyzed. The effect of reflection on gain fluctuation in TWT should be analyzed by using a fourth-order model considering reflected waves. The transfer matrix is established by using the transfer matrix method for the scattering types from left to right and from right to left incident at nodes. The effects of single reflection node of slow wave circuit, Pierce velocity parameter b of slow wave circuit and multiple random distribution discontinuities of gain parameter C on the small signal gain of TWT are studied under different space charge parameters. The results are in good agreement with the Chernin model. Taking G-band TWT as an example, the small signal gain fluctuation caused by several random discontinuities with two discontinuous points and periodic length in the periodic length distribution of slow wave structure is analyzed. The results show that the greater the manufacturing error, the longer the distance between the two discontinuous points of the period length distribution, the larger the gain fluctuation of small signal, and the larger the gain fluctuation can be caused by multiple small discontinuities.
【作者单位】：中国科学院电子学研究所;
【基金】：国家自然科学基金青年科学基金(批准号:61401427)资助的课题~~
【分类号】：TN124

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