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一种用于太赫兹辐射源的脊加载交错双叶片慢波结构。

A ridge-loaded staggered double-vane slow wave structure for terahertz radiation sources.

作者信息

Latif Jibran, Wang Zhanliang, Jameel Atif, Ali Bilawal, Nadeem Muhammad Khawar, Gong Yubin

机构信息

School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, China.

出版信息

Sci Rep. 2024 Dec 28;14(1):31328. doi: 10.1038/s41598-024-82796-8.

DOI:10.1038/s41598-024-82796-8
PMID:39732870
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11682434/
Abstract

A ridge-loaded staggered double-vane slow-wave structure is proposed for terahertz radiation sources employing a sheet electron beam. This slow-wave structure has the advantages of enhanced electric field and energy density distribution and improved interaction impedance in the beam-wave interaction region. High-frequency characteristics are investigated for the proposed slow wave structure and compared with those of the staggered double-vane slow wave structure. The slow wave structure is fabricated and experimentally tested for transmission and reflection properties, revealing [Formula: see text] above -2 dB and [Formula: see text] below -17 dB at 0.34 THz for a backward wave oscillator. Steady transmission of the 21.7 kV sheet electron beam is achieved by designing a periodic cusped magnetic system (0.2 T) along with a sheet electron beam gun (50 mA). Beam-wave interaction simulations utilizing 100 periods demonstrate a peak power of 14 W and continuous frequency tuning from 0.295-0.375 THz for the proposed slow wave structure, whereas the staggered double-vane slow wave structure achieves 8.5 W peak power and frequency tuning from 0.308-0.366 THz. The sensitivity of the output power to the added ridge geometry is also analyzed. These findings indicate that the novel ridge-loaded staggered double vane slow-wave structure is promising for developing high-power broad frequency tunable terahertz radiation sources.

摘要

本文提出了一种用于采用片状电子束的太赫兹辐射源的脊加载交错双叶片慢波结构。这种慢波结构在束波相互作用区域具有增强的电场和能量密度分布以及改善的互作用阻抗等优点。对所提出的慢波结构的高频特性进行了研究，并与交错双叶片慢波结构的高频特性进行了比较。制作了该慢波结构并对其传输和反射特性进行了实验测试，结果表明，对于一个返波振荡器，在0.34太赫兹时，传输高于-2分贝，反射低于-17分贝。通过设计一个周期性尖齿磁场系统（0.2特斯拉）以及一个片状电子束枪（50毫安），实现了21.7千伏片状电子束的稳定传输。利用100个周期进行的束波相互作用模拟表明，对于所提出的慢波结构，峰值功率为14瓦，连续频率调谐范围为0.295 - 0.375太赫兹，而交错双叶片慢波结构的峰值功率为8.5瓦，频率调谐范围为0.308 - 0.366太赫兹。还分析了输出功率对附加脊几何形状的灵敏度。这些结果表明，这种新型的脊加载交错双叶片慢波结构在开发高功率宽频可调太赫兹辐射源方面具有潜力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/42b3/11682434/15912bd74440/41598_2024_82796_Fig14_HTML.jpg
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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.
3
Multiple-beam and double-mode staggered double vane travelling wave tube with ultra-wide band.具有超宽带的多波束双模式交错双叶片行波管
Sci Rep. 2020 Nov 19;10(1):20159. doi: 10.1038/s41598-020-77204-w.