亚毫米波矩形te0.1到圆形te0.1模式转换器的设计与测量

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

IEEE Transactions on Microwave Theory and Techniques Pub Date : 2025-03-26 DOI:10.1109/TMTT.2025.3550734

Mingxu Li;Jingrui Duan;Zhigang Lu;Peng Gao;Yuan Zheng;Ping Zhang;Zhanliang Wang;Shaomeng Wang;Huarong Gong;Yubin Gong

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引用次数: 0

摘要

本文设计、制作并测试了一种亚毫米波（MMW）矩形te0.1到圆形te0.1模式转换器。模式转换顺序实现从矩形te1,0模式到矩形te2,0模式，再到圆形te0,1模式。为了实现矩形te1,0到矩形te2,0的模式转换，研究了一种紧凑的蛇形模式转换器设计。理论分析和数值模拟结果表明，所提出的蛇形模式变换器在较宽的带宽范围内具有较高的模式转换效率。模拟的传输特性表明，矩形te1,0到圆形te0,1模式转换实现了96.9 GHz （356.0 ~ 452.9 GHz）的1 dB转换带宽，具有高模式纯度（圆形te1,1 \lt -20$ dB）和低反射系数（$S_{11} \lt -23$ dB）。采用纳米计算机数控铣削技术，在无氧铜（OFC）上实现了制式模式转换器。在1 db转换带宽范围内，传输特性的冷试验结果与仿真结果的一致性为±5%。在397.2-446.7 GHz的带宽范围内，模式转换器的传输损耗约为5 dB。与传统的矩形波导（RW）相比，传输损耗明显降低，突出了模式转换器的有效性。紧凑的亚毫米波圆形TE0,1模式转换器显示了其低损耗太赫兹（THz）波导的优势，为集成到高频系统提供了巨大的潜力。

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Design and Measurement of a Sub-Millimeter-Wave Rectangular TE1,0 to Circular TE0,1 Mode Converter

In this article, a sub-millimeter-wave (MMW) rectangular TE1,0 to circular TE0,1 mode converter is designed, fabricated, and tested. The mode conversion is achieved sequentially from rectangular TE1,0 mode to rectangular TE2,0 mode and then to circular TE0,1 mode. To realize the mode conversion from rectangular TE1,0 to rectangular TE2,0, a compact serpentine mode converter design is investigated. Theoretical analysis and numerical simulations demonstrate that the proposed serpentine mode converter demonstrates high mode conversion efficiency across a wide bandwidth. The simulated transmission characteristics reveal that the rectangular TE1,0 to circular TE0,1 mode conversion achieves a 1-dB conversion bandwidth of 96.9 GHz (356.0–452.9 GHz), with high mode purity (

$S_{21}$

for circular TE

$_{2,1} \lt -20$

dB) and low reflection coefficients (

$S_{11} \lt -23$

dB). The fabricated mode converter was realized on oxygen-free copper (OFC) using the nano computer numerical control (nano-CNC) milling technology. The cold-test results of the transmission characteristics have an agreement of ±5% over 1-dB conversion bandwidth with the simulations. Within the bandwidth range of 397.2–446.7 GHz, the mode converter exhibits a transmission loss of approximately 5 dB. Compared to a conventional rectangular waveguide (RW), the transmission loss is significantly lower, highlighting the effectiveness of the mode converter. The compact sub-MMW circular TE0,1 mode converter reveals its advantages for low-loss terahertz (THz) waveguides, providing substantial potential for integration into high-frequency systems.

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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.