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毫米波负折射率超材料天线阵列。

Millimeter wave negative refractive index metamaterial antenna array.

作者信息

Aziz Rao Shahid, Koziel Slawomir, Pietrenko-Dabrowska Anna

机构信息

Engineering Optimization and Modeling Center, Reykjavik University, 102, Reykjavik, Iceland.

Faculty of Electronics, Telecommunications and Informatics, Gdansk University of Technology, 80-233, Gdansk, Poland.

出版信息

Sci Rep. 2024 Jul 11;14(1):16037. doi: 10.1038/s41598-024-67234-z.

DOI:10.1038/s41598-024-67234-z
PMID:38992148
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11239886/
Abstract

In this paper, a novel negative refractive index metamaterial (NIM) is developed and characterized. The proposed metamaterial exhibits negative effective permittivity (ε) and negative effective permeability (µ) at millimeter wave frequency of 28 GHz. This attractive feature is utilized to enhance the gain of a microstrip patch antenna (MPA). Two thin layers of 5 × 5 subwavelength unit cell array of NIM are placed above a single MPA to enhance the gain of the antenna. Each unit cell has an area of 3.4 × 3.4 mm. A gain increase of 7.9 dBi has been observed when using the proposed NIM as a superstrate. Furthermore, the NIM array is placed over a 2 × 2 array of MPAs with four ports to demonstrate versatility of the metamaterial. The total size of the 2 × 2 antenna array system with N-MTM is about 61.1 × 34 × 16mm (5.71λ × 3.18λ × 1.5λ, where λ is the free-space wavelength at 28 GHz). The measurement result indicate that the maximum gain of the antenna array is 13.5dBi. A gain enhancement of 7.55 dB in E-Plane and 7.25 dB in H-Plane at the resonant frequency of 28 GHz is obtained. The proposed antenna structure is suitable for 5G millimeter wave communications, in particular, for possible implementation in future millimeter wave access points and cellular base stations.

摘要

在本文中，一种新型的负折射率超材料（NIM）被研发并进行了特性表征。所提出的超材料在28GHz毫米波频率下呈现出负的有效介电常数（ε）和负的有效磁导率（µ）。这一引人注目的特性被用于提高微带贴片天线（MPA）的增益。两层5×5亚波长单元胞阵列的NIM被放置在单个MPA上方以提高天线增益。每个单元胞的面积为3.4×3.4mm。当使用所提出的NIM作为覆盖层时，观察到增益增加了7.9dBi。此外，NIM阵列被放置在一个具有四个端口的2×2MPA阵列上方，以展示超材料的通用性。带有N-MTM的2×2天线阵列系统的总尺寸约为61.1×34×16mm（5.71λ×3.18λ×1.5λ，其中λ是28GHz时的自由空间波长）。测量结果表明天线阵列的最大增益为13.5dBi。在28GHz谐振频率下，在E平面获得了7.55dB的增益增强，在H平面获得了7.25dB的增益增强。所提出的天线结构适用于5G毫米波通信，特别是适用于未来毫米波接入点和蜂窝基站的可能应用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e8a3/11239886/4cc8c3757af4/41598_2024_67234_Fig18_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e8a3/11239886/e9a6dc3ad324/41598_2024_67234_Fig10_HTML.jpg
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Rep Prog Phys. 2016 Jul;79(7):076401. doi: 10.1088/0034-4885/79/7/076401. Epub 2016 Jun 16.
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Electromagnetic parameter retrieval from inhomogeneous metamaterials.从非均匀超材料中反演电磁参数
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Composite medium with simultaneously negative permeability and permittivity.具有同时为负的磁导率和介电常数的复合介质。
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