Reconfigured Grating Structure With Frequency-Selective Characteristics for Higher Order Mode Suppression

IF 4.5 1区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Microwave Theory and Techniques Pub Date : 2025-04-15 DOI:10.1109/TMTT.2025.3556878

Jingrui Duan;Haifeng Chen;Zhigang Lu;Peng Gao;Zechuan Wang;Yuan Zheng;Ping Zhang;Zhanliang Wang;Shaomeng Wang;Huarong Gong;Yubin Gong

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引用次数: 0

Abstract

To suppress the higher order mode (HOM) within terahertz (THz) traveling wave tubes (TWTs), a novel layout of slow wave structure (SWS) named reconfigured grating (RG) has been proposed in this article. Based on the staggered double grating (SDG), the RG achieves simultaneous frequency-selective and wave-absorbing characteristics by integrating two high-pass filter (HPF) functional layers and two absorbing layers alongside it. As signals pass through the RG, the fundamental mode (FM) is confined in the interaction circuit region to continuous interaction with the electrons. The HOMs are effectively filtered and absorbed. Beam-wave interaction results predict the enhancements in saturated power, electron efficiency, and effective HOMs suppression in the RG-TWT. Meanwhile, the fabrication feasibility and transmission characteristics of RG-SWSs were confirmed using high-precision computer numerical control (CNC) milling technology.

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具有频率选择特性的高阶模抑制重构光栅结构

为了抑制太赫兹行波管（TWTs）内的高阶模式（HOM），本文提出了一种新的慢波结构（SWS）布局，称为重构光栅（RG）。基于交错双光栅（SDG）， RG通过集成两个高通滤波器（HPF）功能层和相邻的两个吸收层来实现同时的频率选择和吸波特性。当信号通过RG时，基模（FM）被限制在相互作用电路区域内，与电子持续相互作用。HOMs被有效地过滤和吸收。波束-波相互作用的结果预测了RG-TWT中饱和功率、电子效率和有效HOMs抑制的增强。同时，利用高精度数控铣削技术验证了RG-SWSs的制造可行性和传动特性。

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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来源期刊

IEEE Transactions on Microwave Theory and Techniques 工程技术-工程：电子与电气

CiteScore

8.60

自引率

18.60%

发文量

486

审稿时长

6 months

期刊介绍： The IEEE Transactions on Microwave Theory and Techniques focuses on that part of engineering and theory associated with microwave/millimeter-wave components, devices, circuits, and systems involving the generation, modulation, demodulation, control, transmission, and detection of microwave signals. This includes scientific, technical, and industrial, activities. Microwave theory and techniques relates to electromagnetic waves usually in the frequency region between a few MHz and a THz; other spectral regions and wave types are included within the scope of the Society whenever basic microwave theory and techniques can yield useful results. Generally, this occurs in the theory of wave propagation in structures with dimensions comparable to a wavelength, and in the related techniques for analysis and design.