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一种用于 340GHz 行波管的新型交错双分段光栅慢波结构。

A Novel Staggered Double-Segmented Grating Slow-Wave Structure for 340 GHz Traveling-Wave Tube.

机构信息

National Key Laboratory of Science and Technology on Vacuum Electronics, School of Electronic Science and Engineering, University of Electronic Science and Technology of China, No. 2006 Xiyuan Avenue, High-Tech District (West District), Chengdu 611731, China.

Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China.

出版信息

Sensors (Basel). 2023 May 15;23(10):4762. doi: 10.3390/s23104762.

DOI:10.3390/s23104762
PMID:37430677
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10221312/
Abstract

In this paper, a novel staggered double-segmented grating slow-wave structure (SDSG-SWS) is developed for wide-band high-power submillimeter wave traveling-wave tubes (TWTs). The SDSG-SWS can be considered as a combination of the sine waveguide (SW) SWS and the staggered double-grating (SDG) SWS; that is, it is obtained by introducing the rectangular geometric ridges of the SDG-SWS into the SW-SWS. Thus, the SDSG-SWS has the advantages of the wide operating band, high interaction impedance, low ohmic loss, low reflection, and ease of fabrication. The analysis for high-frequency characteristics shows that, compared with the SW-SWS, the SDSG-SWS has higher interaction impedance when their dispersions are at the same level, while the ohmic loss for the two SWSs remains basically unchanged. Furthermore, the calculation results of beam-wave interaction show that the output power is above 16.4 W for the TWT using the SDSG-SWS in the range of 316 GHz-405 GHz with a maximum power of 32.8 W occurring at 340 GHz, whose corresponding maximum electron efficiency is 2.84%, when the operating voltage is 19.2 kV and the current is 60 mA.

摘要

本文提出了一种新颖的交错双分段光栅慢波结构(SDSG-SWS)，用于宽带高功率亚毫米波行波管(TWT)。SDSG-SWS 可以看作是正弦波导(SW) SWS 和交错双光栅(SDG) SWS 的组合;也就是说，它是通过将 SDG-SWS 的矩形几何脊引入 SW-SWS 而得到的。因此，SDSG-SWS 具有工作带宽宽、互作用阻抗高、欧姆损耗低、反射低、易于制造等优点。高频特性分析表明，与 SW-SWS 相比，当它们的色散处于同一水平时，SDSG-SWS 具有更高的互作用阻抗，而两种 SWS 的欧姆损耗基本保持不变。此外，基于电磁场的注波互作用计算结果表明，在工作电压为 19.2kV、电流为 60mA 的情况下，采用 SDSG-SWS 的 TWT 在 316GHz-405GHz 频率范围内输出功率大于 16.4W，在 340GHz 时输出功率最大为 32.8W，对应的最大电子效率为 2.84%。

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本文引用的文献

1
Double-mode and double-beam staggered double-vane traveling-wave tube with high-power and broadband at terahertz band.太赫兹频段高功率宽带双模双束交错双叶片行波管
Sci Rep. 2022 Jul 14;12(1):12012. doi: 10.1038/s41598-022-15975-0.
2
A piecewise sine waveguide for terahertz traveling wave tube.一种用于太赫兹行波管的分段正弦波导。
Sci Rep. 2022 Jun 21;12(1):10449. doi: 10.1038/s41598-022-14587-y.
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Terahertz power.太赫兹功率。
Nature. 2002 Nov 14;420(6912):131-3. doi: 10.1038/420131a.