Wideband shared-aperture orthogonal mode antenna pair for MIMO application

Bingyi Qian, Min Liu, Yiran Da, Yingsong Li, Azremi Abdullah Al-Hadi, Ahmed A. Kishk and Xiaoming Chen

Journal of Electromagnetic Waves and Applications, 2024, vol. 38, issue 10, 1088-1107

Abstract: A wideband shared-aperture antenna is designed for MIMO application based on asymmetric orthogonal-mode antenna pair. A symmetric T-shaped antenna and an asymmetric double-L-shaped antenna constitute the proposed antenna pair. Two co-planar antenna elements are configured above the ground (on the same substrate side). The wideband self-decoupling characteristic of the antenna pair is achieved via orthogonal modes. The proposed shared-aperture antenna demonstrates good impedance matching, high isolation, and good diversity performance over a bandwidth of 3.04–5.28 GHz, covering the 5G N77/N78/N79 bands, which is suitable for compact 5G MIMO terminals. Two such antenna pairs are arranged along the upper side of the ground to construct a 4-port MIMO antenna. The proposed MIMO antenna is fabricated and tested to verify its performance. Favorable results are realized, including impedance matching, isolation, efficiency, and ECC. The measured results are in good agreement with the simulated results.

Date: 2024
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DOI: 10.1080/09205071.2024.2354763

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