volume | PIER Journals

Abstract

In the study, a hybrid decoupling architecture (HDA) based on metamaterials and metasurfaces is proposed. Subsequently, an enhanced ultra-wideband (EUWB) two-port multiple-input multiple-output (MIMO) array antenna with miniaturization, high isolation, and low coupling is designed based on the proposed HDA. The antenna size is 48 mm × 32 mm × 1.6 mm with an FR4 dielectric substrate, whose relative dielectric constant is 4.4, and loss tangent is 0.005. The simulated and measured results show that the antenna operates from 1.89 to 14.85 GHz with a bandwidth of 12.96 GHz and relative bandwidth of 154.8%. The port isolation S₂₁ is less than -26 dB; the envelope correlation coefficient (ECC) is less than 0.06; the diversity gain (DG) is higher than 9.5; and the maximum gain reaches 7.83 dB. Therefore, the enhanced ultra-wideband two-port MIMO array antenna designed based on HDA exhibits excellent performance and has broad application potential in various scenarios for wireless communications.

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Dr. Xuemei Zheng

Mr. Linfei Yue

Mr. Shengbang Ma