Performance Evaluation and Experimental Study of a 0.34-THz Folded Waveguide Sheet Beam BWO

IF 1.8 3区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC Journal of Infrared, Millimeter, and Terahertz Waves Pub Date : 2024-03-25 DOI:10.1007/s10762-024-00980-3

Jibran Latif, Huarong Gong, Zhanliang Wang, Atif Jameel, Shaomeng Wang, Jinjun Feng, Yubin Gong

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Abstract

Terahertz (THz) backward wave oscillators (BWOs) hold immense potential for a broad range of industrial and military applications. This study presents a comparative analysis of 0.34 THz sheet beam (SB) and circular beam (CB) folded waveguide (FWG) BWOs. We examined the design, simulation (CST MWS and PS, HFSS), and performance, revealing that sheet beam BWO outperforms circular beam BWO in terms of interaction impedance, power, efficiency, and bandwidth. Under 20 kV beam voltage and 10 mA beam current conditions, sheet beam BWO achieves 0.47 \(\Omega \) (0.34 THz) interaction impedance, 0.65 W output power, and a bandwidth of approximately 12 GHz, surpassing the 0.18 \(\Omega \), 0.23 W, and 8.5 GHz values of circular beam BWO, respectively. Furthermore, this study encompasses the fabrication and thorough characterization of the sheet beam BWO’s slow-wave structure. Experimental validation confirms its effectiveness, with measured \(S_{11}\) demonstrating reflection below \(-\)10 dB and \(S_{21}\) exhibiting transmission above \(-\)2 dB.

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0.34-THz 折叠波导片束 BWO 的性能评估和实验研究

太赫兹（THz）后向波振荡器（BWOs）在广泛的工业和军事应用中具有巨大的潜力。本研究对 0.34 太赫兹片束 (SB) 和圆束 (CB) 折叠波导 (FWG) BWOs 进行了比较分析。我们考察了设计、仿真（CST MWS 和 PS、HFSS）和性能，结果表明片束 BWO 在相互作用阻抗、功率、效率和带宽方面均优于圆束 BWO。在 20 kV 束电压和 10 mA 束电流条件下，片束 BWO 实现了 0.47 \(\Omega \) (0.34 THz) 的相互作用阻抗、0.65 W 的输出功率和约 12 GHz 的带宽，分别超过了圆束 BWO 的 0.18 \(\Omega \)、0.23 W 和 8.5 GHz 值。此外，这项研究还包括片束 BWO 慢波结构的制造和全面表征。实验验证证实了其有效性，测得的\(S_{11}\)反射率低于\(-\)10 dB，\(S_{21}\)传输率高于\(-\)2 dB。

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来源期刊

Journal of Infrared, Millimeter, and Terahertz Waves 工程技术-工程：电子与电气

CiteScore

6.20

自引率

6.90%

发文量

审稿时长

3 months

期刊介绍： The Journal of Infrared, Millimeter, and Terahertz Waves offers a peer-reviewed platform for the rapid dissemination of original, high-quality research in the frequency window from 30 GHz to 30 THz. The topics covered include: sources, detectors, and other devices; systems, spectroscopy, sensing, interaction between electromagnetic waves and matter, applications, metrology, and communications. Purely numerical work, especially with commercial software packages, will be published only in very exceptional cases. The same applies to manuscripts describing only algorithms (e.g. pattern recognition algorithms). Manuscripts submitted to the Journal should discuss a significant advancement to the field of infrared, millimeter, and terahertz waves.