北京航空航天大学学报 ›› 2015, Vol. 41 ›› Issue (10): 1777-1784.doi: 10.13700/j.bh.1001-5965.2015.0207

• 电磁理论与应用 • 上一篇    下一篇

带状注分布作用速调管多间隙谐振腔高频特性

阮存军1, 戴军1, 陈姝媛2, 李仁杰1, 占敏1   

  1. 1. 北京航空航天大学电子信息工程学院, 北京 100191;
    2. 试验物理与计算数学国家重点实验室, 北京 100076
  • 收稿日期:2015-04-10 修回日期:2015-05-14 出版日期:2015-10-20 发布日期:2015-11-02
  • 通讯作者: 阮存军(1974-),男,甘肃天水人,研究员,ruancunjun@buaa.edu.cn,主要研究方向为微波、毫米波与太赫兹电子学. E-mail:ruancunjun@buaa.edu.cn
  • 基金资助:
    国家自然科学基金(61222110);北京航空航天大学基本科研基金(30418501)

RF characteristics of multiple-gap resonant cavity for sheet beam extended interaction klystron

RUAN Cunjun1, DAI Jun1, CHEN Shuyuan2, LI Renjie1, ZHAN Min1   

  1. 1. School of Electronic and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;
    2. National Key Laboratory of Science and Technology on Test Physics & Numerical mathematical, Beijing 100076, China
  • Received:2015-04-10 Revised:2015-05-14 Online:2015-10-20 Published:2015-11-02

摘要: 带状注分布作用速调管(SBEIK)的典型特征是平面多间隙谐振腔及其分布式注波互作用系统.对应用于W波段微型化SBEIK的一种强耦合式五间隙分布作用谐振腔进行了研究,并结合传统的弱耦合式谐振腔与输出腔对其高频特性进行了深入分析,结果表明强耦合式腔体具备谐振模式隔离、各间隙高频场(RF)的耦合及其能量输出的良好技术优势.此外,对五间隙谐振腔周期结构引入的轴向简并模式竞争问题进行了研究,得到其工作模式与竞争模式之间的频率间隔在600MHz以上,完全可以满足SBEIK整体方案设计中100MHz带宽的要求.最后,利用三维粒子模拟(PIC)软件对优化后的强耦合式五间隙输出腔注波互作用性能进行了初步的模拟仿真,验证了其在相应工作模式上具备了高功率产生与输出的技术特征.本研究工作对毫米波和太赫兹频段高功率SBEIK的物理设计与工程研究具有重要的价值.

关键词: W波段, 带状电子注, 强耦合式, 五间隙谐振腔, 分布作用速调管(EIK)

Abstract: The sheet beam extended interaction klystron (SBEIK) has the typical and attractive characteristics with the plan structural multiple-gap cavity and extended beam-wave interaction system. A type of novel miniaturization strong-coupling five-gap extended resonant cavity was investigated combined with the design of W-band SBEIK, which was compared with the traditional weak-coupling five-gap resonant and output cavity. The obtained characteristics shows that the strong-coupling five-gap cavity may have many advantages of resonant mode separation, radio frequency (RF) fields coupling in the gap and RF energy exporting, etc. Then, the degeneracy mode competition for the strong-coupling five-gap cavity was studied due to its axial period structures. The result shows that the frequency interval between the work mode and vicinal non-working mode is above 600MHz, which is higher enough than the required 100MHz bandwidth for the SBEIK. Finally, the 3D particle in cell (PIC) simulation software was used to calculate the beam-wave interaction for the strong-coupling five-gap extended output cavity, the expected high output power was observed with the corresponding performance and favorable stability. Thus, the research is very important for the physical design and engineering development of the SBEIK in the millimeter-wave and terahertz band with high power output radiation later.

Key words: W-band, sheet beam electron, strong-coupling, five-gap resonant cavity, extended interaction klystron (EIK)

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