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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2026-09-20
Design of a Dual-Band Quad-Element MIMO Antenna with Wideband Characteristics for 5G Sub-6 GHz and U6G Applications
By
Chengzhu Du,

    Professor Chengzhu Du

    School of Electronics and Information Engineering

    Shanghai University of Electric Power

    China

    Homepage

Yuhao Wu,

    Dr. Yuhao Wu

    Faculty of Artificial Intelligence

    Shanghai University of Electric Power

    China

    Homepage

Ziyi Zhou

    Dr. Ziyi Zhou

    Faculty of Artificial Intelligenc

    Shanghai University of Electric Power

    China

    Homepage

Progress In Electromagnetics Research C, Vol. 173, 308-320, 2026
doi:10.2528/PIERC26072802 | Google Scholar

Abstract
This paper proposes and investigates a dual-band four-element MIMO antenna structure. The antenna operates across several frequency bands, including U6G, 5G n256, 4G LTE, WiMAX, and WLAN 5G, while maintaining its intended functionality. The proposed CPW-fed antenna adopts slot radiators and occupies a compact volume of 103.72 × 103.72 × 0.8 mm3. A trident-shaped branch enhances bandwidth, and the antenna's dual-band performance comes from etching a semi-elliptical ring slot. Experimental results show that the antenna provides two impedance bandwidths of 2200 MHz (1.81-4.01 GHz) and 2380 MHz (4.85-7.23 GHz). These bandwidths fully cover the required operating ranges, including WLAN 5G (5.15-5.35 GHz and 5.725-5.825 GHz), U6G (6.425-7.125 GHz), 5G n256 (1.98-2.01 GHz and 2.17-2.2 GHz), 4G LTE (2.3-2.39 GHz and 2.555-2.655 GHz) and WiMAX (3.3-3.8 GHz). Furthermore, the proposed antenna achieves a peak gain of 4.08 dB at 2.5 GHz and 6.42 dB at 6 GHz. The ECC remains less than 0.003, and the DG exceeds 9.99, indicating superior diversity performance. These findings indicate that the proposed dual-band four-element MIMO antenna is highly suitable for use in 5G sub-6 GHz and U6G communication systems.
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Citation
Chengzhu Du, Yuhao Wu, and Ziyi Zhou, "Design of a Dual-Band Quad-Element MIMO Antenna with Wideband Characteristics for 5G Sub-6 GHz and U6G Applications," Progress In Electromagnetics Research C, Vol. 173, 308-320, 2026.
doi:10.2528/PIERC26072802
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