矩形环双杆慢波结构高频特性  

High-Frequency Characteristics of Rectangular-Ring Double-Bar Slow-Wave Structures

作　　者：于灿 魏望和[1] 胡文 钟辉 YU Can;WEI Wang-he;HU Wen;ZHONG Hui(School of Science,Jiangxi University of Science and Technology,Ganzhou 341000,China)

机构地区：[1]江西理工大学理学院,江西赣州341000

出　　处：《真空电子技术》2021年第6期62-66,共5页Vacuum Electronics

基　　金：国家自然科学基金项目(61761022);江西省教育厅科技项目(GJJ160622)。

摘　　要：提出了一种适合于高功率行波管的新型矩形环双杆慢波结构。利用电磁仿真方法分析了慢波结构参数对色散和互作用阻抗的影响,并与圆环双杆慢波电路进行了对比。结果显示:矩形环双杆慢波电路的色散平坦度和归一化相速受横截面宽高比的影响较小,在横截面周长相同情况下,矩形环双杆慢波结构可以提供更平坦色散,并且在中高频段拥有更大的互作用阻抗。A novel rectangular-ring double-bar(RRDB)slow-wave structure(SWS)based on micro-machining technology is proposed for the development of high-power traveling-wave tubes.The influence of the structure parameters on high frequency characteristics of the RRDB SWS is studied by 3D electromagnetic simulation software HFSS,and the result is compared with that of the circular-ring double-bar(RDB)SWS.The comparison shows that the dispersion flatness and normalized phase velocity of the RRDB SWS are less affected by the cross-sectional aspect ratio.When the cross-sectional perimeter is the same,the RRDB SWS can provide more flat dispersion and have greater interaction impedance in medium and high frequency bands.

关 键 词：矩形环双杆 慢波结构 色散特性 互作用阻抗 带状电子束 

分 类 号：TN103[电子电信—物理电子学]