螺旋线径向挤压变形对其慢波结构冷测特性的影响  

Effect of pressed helix in helical slow-wave structure on TWT cold-test characteristics

作　　者：李实[1] 刘韦[1] 苏小保[1] 阴和俊[1] 

机构地区：[1]中国科学院电子学研究所微波器件中心,北京100080

出　　处：《强激光与粒子束》2004年第9期1186-1190,共5页High Power Laser and Particle Beams

基　　金：中科院电子学研究所知识创新基金资助课题(E3131);中科院电子学研究所青年创新基金资助课题(E3130 07)

摘　　要：　介绍了用MAFIA软件的准周期边界条件计算螺旋线行波管慢波结构的色散和耦合阻抗,以及用ANSYS软件对螺旋线径向挤压变形建模的方法,并对螺旋线受挤压径向变形对其冷测特性的影响进行了详细的分析。结果表明:螺旋线径向挤压变形会导致相速增大,而在通常的变形范围内耦合阻抗也会增加;当变形继续增大时耦合阻抗上升到最大值后开始下降。The quasi-periodic boundary conditions in the computer code MAFIA was used to determine the effect on dispersion and on-axis interaction impedance of helical slow-wave structure. The Finite Element Method software-ANSYS was used to simulate the helix pressed distortion. And then the effect of pressed helix in helical slow-wave structure on TWT cold-test characteristics was analysed in detail. The results show that both dispersion and on-axis interaction impedance of helical slow-wave structure increase due to helix deformation generally, when the radial relative deformation is less than 1%. While radial relative deformation is more than 1%, the on-axis interaction impedance will decrease.

关 键 词：行波管 螺旋线慢波结构 色散 耦合阻抗 MAFIA软件 ANSYS软件 

分 类 号：TN124[电子电信—物理电子学]