40~50 GHz宽带螺旋线行波管高频系统研究  

Research on High Frequency Structure of 40~50 GHz Broadband Helix Traveling Wave Tubes

作　　者：郑丽[1] 郝保良[1] 李紫琳[1] 李伟[1] 王娟[1] 孟晓君[1] ZHENG Li;HAO Bao-liang;LI Zi-lin;LI Wei;WANG Juan;MENG Xiao-jun(Beijing Vacuum Electronics Research Institute,Beijing 100015,China)

机构地区：[1]北京真空电子技术研究所,北京100015

出　　处：《真空电子技术》2021年第3期76-80,共5页Vacuum Electronics

摘　　要：针对40 GHz以上电磁兼容试验需求,开展了40~50 GHz宽带螺旋线行波管研制。本文主要对该行波管的高频系统进行技术研究。通过尺寸共度效应理论分析和螺旋线表面镀膜降低高频衰减技术,研究了高频率行波管的色散特性、耦合阻抗、高频衰减、横向传播常数等高频特性的变化规律。采用无翼片加载慢波结构、螺旋线双渐变技术和衰减器分布优化设计方法,提高了宽带输出功率和电子效率,同时抑制了返波振荡。研制出的行波管在40~50 GHz范围内,饱和功率达到110 W,能够满足宽带毫米波电磁兼容试验的需求。To meet the electromagnetic compatibility(EMC)test requirements over 40 GHz,40~50 GHz broadband helix TWT is developed at BVERI.The high frequency structure of the TWT is mainly studied.Based on wavelength-size-matching effect of linear-beam tube and the helix surface-coating to reduce high frequency attenuation,the dispersion,coupling impedance,high frequency attenuation and radical propagation constant of the slow wave structure are analyzed and simulated.The vaneless slow wave structure,helix double-tapering method and optimal design of attenuators distribution are adopted to improve the broadband output power and electronic efficiency,and meanwhile to suppress backward wave oscillation.The developed TWT has a saturated output power of 110 W in the frequency range of 40~50 GHz and can meet the needs of broadband millimeter wave EMC tests.

关 键 词：毫米波 宽带行波管 螺旋线慢波系统 

分 类 号：TN124[电子电信—物理电子学]