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W波段带状注耦合腔慢波结构行波管的设计与冷测
作者:
作者单位:

电子科技大学 电子科学与工程学院 大功率微波电真空器件技术国防科技重点实验室，四川 成都 610054

中图分类号:

TN214


Design and cold-test of sheet beam coupled cavity slow wave structure for W-Band TWT
Author:
Affiliation:

National Key Laboratory of Science and Technology on Vacuum Electronics, School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China

Fund Project:

the Key Laboratory Foundation 614280701020117;China Postdoctoral Science Foundation 2017M62299Supported by the Key Laboratory Foundation (614280701020117), China Postdoctoral Science Foundation (2017M62299)

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    摘要:

    文章对W波段三槽梯形线耦合腔慢波结构（包括大功率输入输出耦合器和射频窗）的加工和冷测进行了研究。此慢波结构由一个矩形波导耦合器馈电，该耦合器由放置在输入腔短边上的三阶阶梯变换矩形波导组成。首先，利用仿真方法研究了慢波结构的色散、互作用阻抗、传输特性和注-波互作用。结果表明，采用三槽梯形线耦合腔慢波结构的行波管能够在91-96GHz的频率范围内提供大于1000 W的饱和输出功率，并且在94GHz频点，饱和输出功率最大，可以达到1125W。其次，采用高精度数控铣床加工出三槽梯形线慢波结构，并将其固定在非磁性不锈钢外壳中。文中给出了带有耦合器和射频窗的三槽梯形线慢波系统的测试结果，表明在90GHz到100GHz的频率范围内，S11 < -10dB。因此，三槽梯形线慢波结构在W波段大功率行波管方面具有应用前景。

    Abstract:

    This paper presents the fabrication and cold-test of a three-slot-staggered-ladder coupled cavity slow wave structure (CC-SWS) along with high power input-output couplers and RF windows in W-band. The SWS is fed by a rectangular waveguide coupler which is made up of a three-order step-transform rectangular waveguide placed on the short edge of the input cavity. Firstly, the dispersion, interaction impedance, transmission property and beam-wave interaction are studied using the simulation method. It is shown that the traveling wave tube (TWT) with a three-slot-staggered-ladder CC-SWS is able to provide a sat-uration output power of more than 1000 W in the frequency range of 91-96GHz, and the maximum saturated output power can reach 1125W at 94 GHz. Secondly, the CC-SWS is fabricated by the high-precision CNC milling and fixed in a nonmagnetic stainless steel housing. Test results of the fab-ricated CC-SWS with couplers and RF-windows are presented, showing the S11 < -10 dB in the frequency range of 90GHz to 100GHz. Therefore, the three-slot-staggered-ladder CC-SWS is a promising slow wave circuit of high power W-band TWT.

    参考文献
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路志刚,葛卫华,温瑞东,苏志成,朱美玲,丁科森,王战亮,唐涛. W波段带状注耦合腔慢波结构行波管的设计与冷测[J].红外与毫米波学报,2020,39(2):157~162]. LU Zhi-Gang, GE Wei-Hua, WEN Rui-Dong, SU Zhi-Cheng, ZHU Mei-Ling, DING Ke-Sen, WANG Zhan-Liang, TANG Tao. Design and cold-test of sheet beam coupled cavity slow wave structure for W-Band TWT[J]. J. Infrared Millim. Waves,2020,39(2):157~162.]

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  • 收稿日期:2019-08-03
  • 最后修改日期:2020-04-01
  • 录用日期:2019-12-02
  • 在线发布日期: 2020-04-01
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