用于sub-6GHz 5G通信的4 × 4高隔离MIMO天线的特性模态分析（TCMA）设计与理论

IF 3 Q3 Physics and Astronomy

Results in Optics Pub Date : 2025-09-25 DOI:10.1016/j.rio.2025.100903

Bhaskara Rao Perli , Tathababu Addepalli , Arashpreet K. Sohi , Sivasubramanyam Medasani , Manish Sharma , Imran Mohd Ibrahim , Ahmed J.A.Al–Gburi

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引用次数: 0

摘要

本研究利用特征模式分析（CMA）研究了一种紧凑的4 × 4杯形多输入多输出（MIMO）天线。六种特性模式的系统设计程序使天线工作在3.5 GHz的工作频率下。通过分析模态显著性、模态场和表面电流，获得了对单元和四元辐射结构的物理洞察。4 × 4 MIMO结构工作在2.8 ~ 4.6 GHz的窄带内。MIMO模型的总尺寸为53 × 53 × 1.6 mm3，印刷在廉价的阻燃基板上。加号形状的去耦网络和辐射贴片的方向在整个工作频段提供了超过20 dB的强隔离。在ECC = 0.000005、DG = 9.9999 dB、TARC = - 10 dB、CCL = 0.02b/s/Hz、MEG = - 3.0 dB时，天线的分集MIMO性能良好。这些天线特性使得MIMO设计适用于6 GHz以下的5G通信。

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Design and Theory of Characteristic Mode Analysis (TCMA) of 4 × 4 high isolation MIMO antenna for sub-6GHz 5G communications

This present work investigates a compact 4 × 4 cup-shaped Multi-Input Multi-Output (MIMO) antenna using Characteristic Mode Analysis (CMA). The systematic design procedure with six characteristic modes allows the antenna to operate at the working frequency of 3.5 GHz. Physical insight into one-element and four-element radiating structures is gained by analysing modal significance, modal fields, and surface currents. The 4 × 4 MIMO structure works in a narrow frequency band of 2.8 to 4.6 GHz. The total size of the MIMO model is 53 × 53 × 1.6 mm3 and is printed on an inexpensive flame-retardant substrate_. The plus-shaped decoupling network and the orientation of the radiating patch provide a strong isolation of more than 20 dB across the operating band. The diversity MIMO performance the antenna provides good results with ECC < 0.000005, DG > 9.9999 dB, TARC < − 10 dB, CCL < 0.02b/s/Hz, and MEG ≅ − 3.0 dB. These antenna features make the MIMO design suitable for sub-6 GHz 5G communications.

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