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Wideband MIMO Antenna System Employing Slot and Via Loading Technique for 5G Terminals.
Xin-Hao Ding1, Liang-Jun Zhan1, Zhen Tan1
1School of Information Science and Technology, Nantong University, Nantong 226019, China.
Sensors (Basel, Switzerland)
|May 13, 2026
Summary
This study presents a wideband four-element multiple-input multiple-output (MIMO) antenna for 5G applications. The compact design offers excellent isolation and bandwidth, covering key frequency bands for mobile devices.
Area of Science:
- Electrical Engineering
- Antenna Theory
- Wireless Communications
Background:
- The increasing demand for high-speed wireless communication necessitates advanced antenna systems.
- Existing antenna solutions often struggle to meet the bandwidth and isolation requirements for modern 5G applications.
Purpose of the Study:
- To design and validate a wideband four-element multiple-input multiple-output (MIMO) antenna system.
- To achieve broad frequency coverage for 5G, V2X, and Wi-Fi bands with a compact form factor.
Main Methods:
- Utilized sequentially rotated rectangular patches in a four-element MIMO configuration.
- Employed TM10, TM01, and TM11δ modes, incorporating slots and metallized vias for wideband operation.
- Implemented additional metallized vias to control inter-element coupling and enhance isolation.
Main Results:
- Achieved a -6 dB impedance bandwidth from 4.23 GHz to 5.96 GHz.
- Demonstrated isolation greater than 17 dB between antenna elements.
- Measured antenna efficiency exceeding 45% and an envelope correlation coefficient (ECC) below 0.25.
Conclusions:
- The proposed MIMO antenna system offers a practical and efficient solution for 5G mobile terminal applications.
- Its broad bandwidth, compact size, and high isolation make it suitable for integrated back cover designs.
- The antenna effectively covers the N79, V2X, and Wi-Fi 5/6 frequency bands.
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