论文部分内容阅读
基于夹持杆分层螺旋带模型和三维电磁场分析研究了毫米波螺旋线行波管慢波系统的导体和介质损耗。螺旋带模型中介质损耗考虑为纵向传播常数的虚部,给出螺旋带中电磁场的解析解,导体损耗由螺旋线和管壳表面的面电流不连续性获得。三维电磁场分析通过本征模法,求解单周期结构的品质因数和周期储能获得有限导电率导体和夹持杆陶瓷损耗角带来的慢波系统高频损耗。结果表明,毫米波段螺旋线的导体损耗和夹持杆的介质损耗远大于管壳导体损耗,介质损耗与陶瓷损耗角呈线性关系,对高频损耗的影响不可忽略。
The conductor and dielectric loss of a millimeter-wave helical TWT slow-wave system are studied based on the model of the helical ribbon with clamping rod and the three-dimensional electromagnetic field analysis. Considering the dielectric loss in the spiral band model as the imaginary part of the longitudinal propagation constant, an analytical solution of the electromagnetic field in the spiral band is given. The conductor loss is obtained from the discontinuity of the surface current of the helix and the surface of the envelope. Three-dimensional electromagnetic field analysis Through the intrinsic mode method, the single-cycle structure of the quality factor and periodic energy storage to obtain finite conductivity conductor and clamping rod ceramic loss angle caused by the high-frequency loss of the slow-wave system. The results show that the conductor loss of the helical wire in the millimeter wave band and the dielectric loss of the clamping rod are much larger than that of the shell conductor. The dielectric loss has a linear relationship with the ceramic loss angle, and the influence on the high frequency loss can not be neglected.