Heavily-loaded wideband helix traveling wave tube

Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524) Pub Date : 2002-08-07 DOI:10.1109/IVELEC.2002.999254

Y. Joo, Sungyung Jung, Jung-Il Kim, Seung-Tae Han, C. Baik, S. Jeon, B. Jia, H. Kim, H. Uhm, G. Park

引用次数: 0

Abstract

The experimental work for a wideband (6-18GHz) helix TWT with a heavy ceramic loading has been carried out at SNU. The well known issues of this kind of TWT are the maximum allowed 2/sup nd/ harmonic level at the lower frequency range and minimum allowed efficiency at the higher frequency range. The "negative" dispersion of a helical slow-wave structure (SWS) is a key concept to ensure a successful operation in wideband helix TWT. In this study, an unconventional "positive phase-velocity-tapering" with an unequal ceramic rod was employed to enhance the second harmonic level at the lower frequencies and efficiency at the higher frequencies. The dispersion and the interaction impedance of the structure were predicted by a 3-D HFSS code.

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重载宽带螺旋行波管

在首尔大学进行了重陶瓷负载的宽带(6-18GHz)螺旋行波管的实验工作。这种行波管众所周知的问题是在较低频率范围内允许的最大2/sup和/ harmonic电平和在较高频率范围内允许的最低效率。螺旋慢波结构(SWS)的“负”色散是确保宽带螺旋行波管成功运行的关键概念。在本研究中，采用一种非常规的“正相速度锥化”方法，采用不均匀的陶瓷棒来提高低频的二次谐波水平和高频的效率。利用三维HFSS程序对结构的色散和相互作用阻抗进行了预测。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Third IEEE International Vacuum Electronics Conference (IEEE Cat. No.02EX524)

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