volume | PIER Journals

Abstract

The proposed prototype miniaturized two port wideband Multi-Input Multi-Output (MIMO) antenna structure to perform over a specified frequency spectrum from 2.6 GHz to 5.1 GHz to support 5G mid-band (n77/n78/n79) applications. The antenna design incorporates a pair of spoon shaped radiating units configured orthogonally to achieve polarization diversity. Enhanced impedance matching (S₁₁) and inter port isolation (S₂₁) are achieved by introducing a pair of T-shaped slots along with rectangular slot in the ground layer. The proposed MIMO antenna achieves a -10 dB impedance bandwidth of 2.5 GHz (2.6 GHz-5.1 GHz), while inter-port isolation level value remain better than -15 dB within the prescribed limit. The developed MIMO antenna is realized in a compact configuration on FR-4 substrate having a physical dimension of 30 × 30 mm². The antenna gain is consistent and stable ranging from 3.5 to 3.9 dB within the targeted frequency band. The diversity performance metrics across the operating frequency range are validated by envelope correlation coefficient (ECC < 0.01), diversity gain (DG < 9.99 dB) and channel capacity loss (CCL < 0.3 bits/s/Hz). To validate the design, antenna is fabricated as a prototype and experimentally measured, which reveals close correlation between experimental and simulated data, confirms the effectiveness of developed MIMO antenna structure is feasible for 5G New Radio (NR) mid-band operation.

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Ms. Shraddha

Dr. Mohammad Arshad

Dr. Kamakshi

Prof. Jamshed Ansari