A Wideband Quad-Port 3-D MIMO Antenna Decoupled With DGS Structure for Roadside Units

IF 4.8 2区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE Antennas and Wireless Propagation Letters Pub Date : 2024-12-02 DOI:10.1109/LAWP.2024.3509869

Shengjie Chen;Xiaoming Liu;Xiaojun Jing;Yuanhao Cui

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Abstract

A wideband quad-port three-dimensional multiple-input--multiple-output (MIMO) antenna for intelligent transportation roadside units is proposed. The MIMO antenna adopts a cube-shaped metal box as its ground, with microstrip patch elements vertically placed on each side of the cube. Therefore, omnidirectional coverage is realized. A concave metal patch is added on the back layer of the dielectric substrate, and two rectangular metal pillars are soldered to both sides of the substrate. These structures significantly improve impedance matching, generating a wideband of 4.69 GHz to 8.92 GHz. Several slots are cut along the edges of the metal box to alter the surface current distribution of the metal, thereby enhancing the port isolation. The interport coupling coefficient is better than −24 dB in the entire frequency range. Particularly, the coupling coefficient is better than −31.2 dB in the vehicle-to-everything (V2X) band [(5.905 to 5.925) GHz]. The microstrip patch antenna measures 15 mm × 13.2 mm × 1.6 mm, and the metal box has a side length of 44 mm and a thickness of 1 mm, indicating a miniaturized design. The envelope correlation coefficient is below 0.002. The diversity gain reaches 9.98 dB. The channel capacity loss is less than 0.4 b/s/Hz.

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基于DGS结构解耦的公路车辆宽带四端口三维MIMO天线

提出了一种用于智能交通路边单元的宽带四端口三维多输入多输出（MIMO）天线。MIMO天线采用立方体形状的金属盒作为地面，在立方体的两侧垂直放置微带贴片元件。从而实现了全向覆盖。在所述介电基板的背面层上添加凹形金属贴片，并在所述基板的两侧焊接两根矩形金属柱。这些结构显著改善了阻抗匹配，产生了4.69 GHz至8.92 GHz的宽带。沿着金属盒的边缘开几个槽来改变金属的表面电流分布，从而增强端口隔离。在整个频率范围内，接口耦合系数优于−24 dB。特别是，在车联网（V2X）频段[(5.905至5.925)GHz]中，耦合系数优于- 31.2 dB。微带贴片天线尺寸为15mm × 13.2 mm × 1.6 mm，金属盒边长为44mm，厚度为1mm，采用小型化设计。包络相关系数小于0.002。分集增益达到9.98 dB。信道容量损失小于0.4 b/s/Hz。

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来源期刊

IEEE Antennas and Wireless Propagation Letters 工程技术-电信学

CiteScore

8.00

自引率

9.50%

发文量

529

审稿时长

1.0 months

期刊介绍： IEEE Antennas and Wireless Propagation Letters (AWP Letters) is devoted to the rapid electronic publication of short manuscripts in the technical areas of Antennas and Wireless Propagation. These are areas of competence for the IEEE Antennas and Propagation Society (AP-S). AWPL aims to be one of the "fastest" journals among IEEE publications. This means that for papers that are eventually accepted, it is intended that an author may expect his or her paper to appear in IEEE Xplore, on average, around two months after submission.

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