宽频带毫米波螺旋线行波管研究  

Research on Wide-band Millimeter Wave Helix TWT

作　　者：丁文豪 魏望和[1] 朱焜 陶聪 冷劲松 Ding Wenhao;Wei Wanghe;Zhu Kun;Tao Cong;Leng Jingsong(School of Science,Jiangxi University of Science and Technology,Ganzhou,Jiangxi 341000,China)

机构地区：[1]江西理工大学理学院,江西赣州341000

出　　处：《机电工程技术》2025年第4期67-71,122,共6页Mechanical & Electrical Engineering Technology

基　　金：国家自然科学基金项目(62361031)。

摘　　要：由于带状电子注在传输的过程中,其横向两个维度的不均匀性可能导致其发生扭曲、旋转、甚至断裂,这无疑增加了传输的难度和复杂性,而圆形电子注具有均匀的形态和较好的聚焦特性,使其在传输过程中更加稳定可靠。所以设计了适用于圆形电子注的W波段半方形环螺旋线行波管。首先,利用电磁仿真软件HFSS对半方形环螺旋线慢波结构的关键参数进行扫描,确定了每个参数对结构色散和阻抗的影响规律,并最终得到了适合在W波段下工作的慢波结构尺寸参数。接着利用仿真软件CST优化了半方形环螺旋线行波管的传输特性,并设计了衰减器成功解决了自激振荡,最后进行了粒子模拟分析。仿真结果显示,在6350 V和0.026 A条件下,半方形环螺旋线行波管在94 GHz处可以获得27.6 W的峰值输出功率,对应的小信号增益为27.42 dB,电子效率约为16.72%,同时其瞬时3 dB带宽为39 GHz(70~109 GHz)。In the process of transmission,the non-uniformity of the transverse two dimensions of the sheet beam may lead to distortion,rotation,or even fracture,which undoubtedly increases the difficulty and complexity of transmission.The pencil beam has uniform shape and better focusing characteristics,which makes it more stable and reliable in the transmission process.Therefore,a W-band half square-ring helix traveling-wave tube(TWT)suitable for pencil beam is designed.Firstly,the key parameters of the half square-ring helix slow wave structure are scanned by the electromagnetic simulation software HFSS,and the influence of each parameter on the dispersion and impedance of the structure is determined.Finally,the size parameters of the slow wave structure suitable for W-band operation are obtained.Then the transmission characteristics of the half square-ring helix TWT are optimized by using simulation software CST,and the self-excited oscillation is successfully solved by an attenuator.Finally,the particle simulation analysis is carried out.The simulation results show that under the conditions of 6350 V and 0.026 A,the half square-ring helix TWT can obtain the peak output power of 27.6 W at 94 GHz,the corresponding small signal gain is 27.42 dB,and the electronic efficiency is about 16.72%.At the same time,its instantaneous 3 dB bandwidth is 39 GHz(70~109 GHz).

关 键 词：W波段 半方形环螺旋线 慢波结构 圆形电子注 

分 类 号：TN124[电子电信—物理电子学]