Terahertz Band Traveling-Wave Tube Based on Folded-Waveguide Slow-Wave Structure With Multiple Sheet Beams

IF 1.5 4区物理与天体物理 Q3 PHYSICS, FLUIDS & PLASMAS

IEEE Transactions on Plasma Science Pub Date : 2025-09-05 DOI:10.1109/TPS.2025.3597344

Yanan Ma;Fengying Lu;Rui Zhang;Yong Wang;Suye Lü

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引用次数: 0

Abstract

A novel multiple sheet beams (MSBs) slow-wave structure (SWS), the horizontal multiple sheet beams folded-waveguide SWS (HMSB-FW SWS), was proposed for terahertz (THz) traveling-wave tubes (TWTs). This design aims to enhance the output power and meet the increasing demand for high-frequency and high-power THz radiation sources used in various applications. By utilizing MSB, the HMSB-FW SWS aims to improve the interaction between the electron beam and the electromagnetic wave. Compared with a vertical multiple sheet beams FW-SWS (VMSB-FW SWS), the HMSB-FW SWS offers a higher interaction impedance, leading to enhanced output power and gain. Simulation results indicate that the proposed HMSB-FW TWT exhibits significant improvements by over two times compared with the VMSB-FW TWT in amplification performance. Based on simulation results, with a magnetic field of 0.6 T and driven by an input signal at a frequency of 230 GHz, a saturated power of 100 W was obtained with a gain of 23 dB, an electron efficiency of 10%, and a 3-dB bandwidth of 20 GHz. Due to the limited fabrication accuracy at THz band, the FW-SWS requires specific tolerance and manufacturing compatibility. A study on zero-drive oscillations was performed to assess the stability of the proposed MSB-FW TWT.

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基于多片波束折叠波导慢波结构的太赫兹行波管

提出了一种用于太赫兹行波管的新型多片波束慢波结构——水平多片波束折叠波导慢波结构（HMSB-FW SWS）。本设计旨在提高输出功率，满足各种应用中对高频、大功率太赫兹辐射源日益增长的需求。通过利用MSB， HMSB-FW SWS旨在改善电子束与电磁波之间的相互作用。与垂直多片波束FW-SWS （VMSB-FW SWS）相比，HMSB-FW SWS具有更高的相互作用阻抗，从而提高了输出功率和增益。仿真结果表明，与VMSB-FW行波管相比，HMSB-FW行波管的放大性能提高了2倍以上。仿真结果表明，在磁场为0.6 T，频率为230 GHz的输入信号驱动下，可获得100 W的饱和功率，增益为23 dB，电子效率为10%，3db带宽为20 GHz。由于太赫兹波段的制造精度有限，FW-SWS需要特定的公差和制造兼容性。通过对零驱动振荡的研究来评估所提出的MSB-FW行波管的稳定性。

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来源期刊

IEEE Transactions on Plasma Science 物理-物理：流体与等离子体

CiteScore

3.00

自引率

20.00%

发文量

538

审稿时长

3.8 months

期刊介绍： The scope covers all aspects of the theory and application of plasma science. It includes the following areas: magnetohydrodynamics; thermionics and plasma diodes; basic plasma phenomena; gaseous electronics; microwave/plasma interaction; electron, ion, and plasma sources; space plasmas; intense electron and ion beams; laser-plasma interactions; plasma diagnostics; plasma chemistry and processing; solid-state plasmas; plasma heating; plasma for controlled fusion research; high energy density plasmas; industrial/commercial applications of plasma physics; plasma waves and instabilities; and high power microwave and submillimeter wave generation.