CST MWS软件模拟三维螺旋线慢波结构  

Computational Simulation for Helical Slow-Wave Circuit by Using CST MWS Code

作　　者：韩博[1] 苏小保[1] 

机构地区：[1]中国科学院电子学研究所微波器件中心

出　　处：《电子学报》2006年第9期1711-1716,共6页Acta Electronica Sinica

摘　　要：本文介绍了用CSTMWS软件的周期边界条件计算行波管螺旋线慢波结构的色散和耦合阻抗等冷测特性的方法,用采取螺旋带模型的理论分析计算结果和实验测试值加以验证,取得了比较一致的结果;并应用这种MWS的模拟方法和螺旋带模型的计算方法分析了具有扇形和T形夹持杆慢波结构的冷测特性,结果表明,相速和耦合阻抗都随着扇形角度的增大而减小,随着T形窄端宽度的增加而减小,随着T形窄端高度的增加而增大.The periodic boundary condition in the three-dimensional （3-D） electromagnetic computer code CST MWS is used to the computational simulation for high-frequency characteristics of helical slow-wave circuit. Validated by the analytical method of tape helix model and the experimental data, the agreement is excellent. The computer code CST MWS and tape helix model are also used in this analysis to determine the effect on dispersion and on-axis interaction impedance of the wedge support rod and T-shaped support rod geometry parameter variations. The results show that the phase velocity and interaction impedance will decrease across the bandwidth while the angle of the wedge support rod and the width of T-shape support rod＇ s narrow end increase, and increase while the height of T-shaped support rod＇s narrow part is longer.

关 键 词：CST MWS 螺旋带 色散 耦合阻抗 周期边界条件 

分 类 号：TN124[电子电信—物理电子学]