volume | PIER Journals

Abstract

This work introduces a compact, low-profile, wideband multiple-input multiple-output (MIMO) antenna module designed for integration into 5G-enabled mobile terminals. The MIMO system comprises four patches with I-slots, each connected to one feed port. For the single patch, the slot controls and merges the TM₁₀ mode with TM₀₁ mode, enabling dual-mode operation. Subsequently, shared-radiator technique is used, utilizing the coupling between the patches. When one patch is activated, it causes adjacent patches to become excited as well, resulting in a multi-patch operational mode that improves impedance matching. To ensure isolation, metallized vias are used to control coupling between elements, achieving an isolation level over 15 dB. The design measures a compact size of 28 mm × 28 mm × 1.5 mm. The prototype exhibits an impedance bandwidth of 4.34-5.06 GHz, confirming its practical usability in N79 band. It achieves over 40% efficiency and low envelope correlation coefficients (ECC). The design's compact size, good isolation, and ease of integration render it a suitable candidate for mobile terminals.

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Mr. Shuaipeng Zhang

Dr. Xiao-Mei Ni