高效率曲折槽波导毫米波行波管设计、制造和冷测
投稿时间:2021-07-09  修订日期:2021-08-08  点此下载全文
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作者单位邮编
田艳艳 电子与信息工程学院 518000
王禾欣 电子科学与工程学院 
石先宝 中国电科思仪科技股份有限公司 
李新义 南京三乐电子信息产业集团有限公司 
宫玉彬 电子科学与工程学院 
何文龙 电子与信息工程学院 518000
基金项目:国家自然科学基金
中文摘要:本文提出一种适用于工作在毫米波段(85-110GHz)的带状注高效率曲折槽波导毫米波行波管,并进行了参数优化设计、加工制造和冷测实验研究。曲折槽波导首次采用一次改变周期相速跳变技术提高带状注毫米波行波管电子互作用效率。论文加工制造了三种不同周期个数(包含相速跳变和均匀相速两种类型)的曲折槽波导,并进行了S参数测试,其结果表明应用一次相速跳变技术的曲折槽波导具有良好的传输特性和较宽的带宽。此外,通过测量三种不同周期个数曲折槽波导的相位传输得到了不同周期p0和p1的色散曲线,其结果证明通过仿真得到的色散曲线和测量得到的色散曲线相吻合。本文中注波互作用三维粒子模拟结果表明:当曲折槽波导慢波结构末端20个半周期采用一次相速跳变技术时,在频点95GHz处输出饱和功率达到240W,比同等条件下的均匀相速曲折槽波导行波管在95GHz处高70W。同时曲折槽波导行波管采用一次相速跳变技术在频带85-110GHz范围内电子效率明显得到提高,并且在95GHz处最大电子效率提高了47%。
中文关键词:曲折槽波导,一次相速跳变,毫米波行波管,强电子效率,高功率源
 
Design, Fabrication and Cold Test of a High Efficiency Folded Groove Waveguide for W-band Sheet Beam TWT
Abstract:In this paper, a design, fabrication and cold test of a high efficiency folded groove waveguide (FGW) for w-band (85-110GHz) sheet beam traveling wave tube (TWT) is proposed. one stage phase velocity taper (OSPVT) was used in the FGW to enhance the electronic efficiency of a millimeter-wave sheet beam TWT. The OSPVT was realized via a change of the period of the FGW. Three FGWs with and without OSPVT were fabricated and their measured s-parameters demonstrate good transmission characteristics and wide bandwidth. Moreover, wave dispersions and phase velocities of the unchanged and OSPVT FGWs were obtained from measured transmission phases. 3-D particle-in-cell simulations of beam-wave interaction predicted that the proposed TWT with an OSPVT of twenty half periods could output a saturated power of 240 W at 95 GHz, which is about 70 W higher than the case of without OSPVT. Meanwhile, the application of the OSPVT improves the electronic efficiency in the whole operating frequency range of 85-110GHz, with a maximum efficiency enhancement of about 47% in the vicinity of 95GHz.
keywords:Folded groove waveguide, Once stage phase  velocity taper, millimeter-wave  traveling wave  tube, electronic efficiency enhancement, high-power  source
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