W波段半矩形环螺旋线行波管设计  

Design of W-band Half Rectangular-ring 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2期60-63,82,共5页Mechanical & Electrical Engineering Technology

基　　金：国家自然科学基金项目(62361031)。

摘　　要：为了适应行波管对高功率、小型化、以及宽频带的发展要求,设计了适合与带状电子注进行注-波互作用的W波段半矩形环螺旋线行波管。利用了计算机电磁仿真软件Ansoft HFSS模拟了半矩形环螺旋线慢波结构的高频特性,并得到了适合在W波段下工作的慢波结构尺寸参数,接着利用仿真软件CST优化了半矩形环螺旋线行波管的传输特性,最后对完成传输特性优化的行波管进行粒子模拟分析。仿真结果显示,所设计的半矩形环螺旋线慢波结构展现出色散平坦、色散值较小且耦合阻抗较高的特点。在6350 V的工作电压和0.026 A的工作电流条件下,其最大峰值输出功率能够达到30.3 W,小信号增益高达27.82 dB,电子效率约为18.35%,同时其瞬时3 dB带宽为38 GHz,能够覆盖70~108 GHz的广泛频率范围。In order to meet the requirements of high power,miniaturization and wide band development of traveling wave tube(TWT),a Wband half rectangular-ring helix TWT suitable for beam-to-wave interaction with banded electron beam is designed.Ansoft HFSS computer electromagnetic simulation software is used to simulate the high frequency characteristics of the slow wave structure of the half rectangular-ring helix,and the size parameters of the slow wave structure suitable for working in the W band are obtained.Then the transmission characteristics of the half rectangular-ring helix TWT are optimized by using the simulation software CST.The simulation results show that the designed half rectangular-ring helix slow wave structure(SWS)shows the characteristics of flat dispersion,small dispersion value and high coupling impedance.Under the operating voltage of 6350 V and the operating current of 0.026 A,its maximum peak output power can reach 30.3 W,small signal gain up to 27.82 dB,electronic efficiency is about 18.35%,and its instantaneous 3 dB bandwidth is 38 GHz.Capable of covering a wide frequency range from 70 GHz to 108 GHz.

关 键 词：W波段 半矩形环螺旋线 慢波结构 带状电子注 行波管 

分 类 号：TN124[电子电信—物理电子学]