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

IF 3.7 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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引用次数: 0

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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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.