Design and cold-test of sheet beam coupled cavity slow wave structure for W-Band TWT
投稿时间:2019-08-03  修订日期:2020-02-20  download
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路志刚 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 lzhgchnn@uestc.edu.cn 
葛卫华 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 625653260@qq.com 
温瑞东 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 1170504607@qq.com 
苏志成 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 435173203@qq.com 
朱美玲 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 2549591547@qq.com 
丁科森 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 602936523@qq.com 
王战亮 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 wangzl@uestc.edu.cn 
唐涛 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 esamuel@uestc.edu.cn 
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.
keywords:traveling wave tube, W-band, three-slot-staggered-ladder, coupled cavity slow wave structure (CC-SWS), cold test
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Copyright:《Journal of Infrared And Millimeter Waves》