volume | PIER Journals

Abstract

This paper presents the design and development of a miniaturized Multiple-Input Multiple-Output (MIMO) antenna for sub-6 GHz 5G applications, featuring reduced cross polarization and enhanced isolation between antenna elements. Utilizing characteristics mode analysis, slots are introduced in the patch to achieve orthogonal mode separation, effectively minimizing cross polarization. Further bandwidth enhancement is achieved by incorporating slot loading in the ground plane. To improve isolation between antenna elements, spiral decoupling (SD) and aperture spiral decoupling (ASD) structures are employed. The proposed MIMO antenna, with dimensions 0.32λ_o*0.32λ_o*0.01λ_o where λ_o is the wavelength at the lower band frequency of 3.5 GHz, was fabricated and experimentally tested to validate its performance. Measurement results indicate significant compactness, low envelope correlation coefficient (ECC), high gain, minimal channel capacity loss, and very low mutual coupling between elements. The measured results are in good agreement with simulated results, confirming that the proposed antenna is a promising candidate for advanced MIMO applications in next-generation wireless communication systems.

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Ms. Jyoti C. Kolte

Dr. Ashwini Kumar

Dr. Payal Bansal