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基于仿真的介质填充圆形波导孔径匹配方法。

Simulation-Based Approach to the Matching of a Dielectric-Filled Circular Waveguide Aperture.

作者信息

Xu Songyuan, Heo Jiwon, Ahn Byoung-Kwon, Lee Chan-Soo, Ahn Bierng-Chearl

机构信息

School of Electric and Computer Engineering, Chungbuk National University, Cheongju 28644, Republic of Korea.

School of Autonomous Vehicle System Engineering, Chungnam National University, Yuseong-gu, Daejeon 34134, Republic of Korea.

出版信息

Sensors (Basel). 2024 Jan 28;24(3):841. doi: 10.3390/s24030841.

DOI:10.3390/s24030841
PMID:38339558
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10857046/
Abstract

The circular waveguide aperture or open-end radiator, one of the canonical antenna elements, can be filled with a dielectric material for miniaturization. With dielectric filling, the aperture reflection increases and impedance matching is necessary. This paper presents a simple but innovative simulation-based approach to the aperture matching of a dielectric-filled circular waveguide aperture. By properly loading the aperture with two- or three-section dielectric rings, the impedance matching is possible over a wide frequency range starting slightly above the TE-mode cutoff and continuing upward. The material for the aperture matching is the same as that filling the waveguide. The proposed matching structure is analyzed and optimized using a simulation tool for the dielectric constant of the filling material ranging from 1.8 to 10. For ≥ 5, the unmatched reflection coefficient ranges from -6.0 dB to -0.9 dB while the matched reflection coefficient is from -20.4 dB to -10.0 dB. The impedance matching has been achieved over more than an octave bandwidth.

摘要

圆形波导孔径或开口端辐射器是典型的天线元件之一，可填充介电材料以实现小型化。填充介电材料后，孔径反射会增加，因此需要进行阻抗匹配。本文提出了一种基于仿真的简单而创新的方法来实现填充介电材料的圆形波导孔径的孔径匹配。通过在孔径上适当加载两段或三段介电环，可以在略高于TE模式截止频率并向上延续的宽频率范围内实现阻抗匹配。用于孔径匹配的材料与填充波导的材料相同。使用仿真工具对填充材料的介电常数范围为1.8至10的情况对所提出的匹配结构进行了分析和优化。对于介电常数≥5的情况，失配反射系数范围为-6.0 dB至-0.9 dB，而匹配反射系数为-20.4 dB至-10.0 dB。已经在超过一个倍频程带宽上实现了阻抗匹配。

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本文引用的文献

1
A New Technique for Broadband Matching of Open-Ended Rectangular Waveguide Radiator.一种用于开口矩形波导散热器宽带匹配的新技术。
Sensors (Basel). 2023 Nov 14;23(22):9176. doi: 10.3390/s23229176.
2
A Dielectric-Filled Waveguide Antenna Element for 3D Imaging Radar in High Temperature and Excessive Dust Conditions.一种用于高温和多尘环境下3D成像雷达的介质填充波导天线元件。
Sensors (Basel). 2016 Aug 22;16(8):1339. doi: 10.3390/s16081339.