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<p>This article introduces an 8 × 8 petal shape MIMO antenna for 5G NR-n48, n77, n78 band applications. A petal shape geometry is used as a radiating element on the top plane whereas defected ground plane, central unit structure, parasitic elements and rectangular slits are used on the ground plane. The petal shape geometry consists of one central circular geometry and four semicircles wherein; semicircles are mounted on each orthogonal diameter endpoints of central circular patch. The curved, tapered edges of petal shape geometry reduce abrupt discontinuities in surface current distribution for transition from feed to radiating edges, which mitigates reflections and surface wave losses. The proposed antenna design is fabricated over FR4 substrate with dimensions of 112 × 112 × 1.6&#xa0;mm³. The proposed antenna resonates at 3.7&#xa0;GHz and achieves a bandwidth of 700&#xa0;MHz with more than 20 dB isolation. The design exhibits a gain of 4.8 dB and 6 dB at 3.7&#xa0;GHz and efficiency greater than 88%. Additionally, the MIMO antenna is characterized by its diversity performance, evaluated using parameters such as ECC, DG, TARC, CCL, and MEG, achieving promising values of ECC = 0.0002, DG ≈ 10 dB, TARC&lt; -10 dB, CCL &lt; 0.2, and − 3 dB &lt; MEG &lt;-12 dB. The intended antenna yields 39.4 bit/s/Hz channel capacity at 20 dB SNR which is closer to theoretical value of 8 × 8 MIMO antenna. In this work, HFSS is used to implement an eight-port MIMO antenna design, and the simulated results are accurately validated using ADS (simulation of an equivalent circuit) and measured results.</p>

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High Performance Metrics 8 × 8 Element MIMO Antenna for 5G NR-n48, n77, n78 Band Applications

  • 期刊论文

  • 发表日期：

    2026年3月31日

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  • Brijesh Mishra,
  • Preksha BV

摘要

This article introduces an 8 × 8 petal shape MIMO antenna for 5G NR-n48, n77, n78 band applications. A petal shape geometry is used as a radiating element on the top plane whereas defected ground plane, central unit structure, parasitic elements and rectangular slits are used on the ground plane. The petal shape geometry consists of one central circular geometry and four semicircles wherein; semicircles are mounted on each orthogonal diameter endpoints of central circular patch. The curved, tapered edges of petal shape geometry reduce abrupt discontinuities in surface current distribution for transition from feed to radiating edges, which mitigates reflections and surface wave losses. The proposed antenna design is fabricated over FR4 substrate with dimensions of 112 × 112 × 1.6 mm³. The proposed antenna resonates at 3.7 GHz and achieves a bandwidth of 700 MHz with more than 20 dB isolation. The design exhibits a gain of 4.8 dB and 6 dB at 3.7 GHz and efficiency greater than 88%. Additionally, the MIMO antenna is characterized by its diversity performance, evaluated using parameters such as ECC, DG, TARC, CCL, and MEG, achieving promising values of ECC = 0.0002, DG ≈ 10 dB, TARC< -10 dB, CCL < 0.2, and − 3 dB < MEG <-12 dB. The intended antenna yields 39.4 bit/s/Hz channel capacity at 20 dB SNR which is closer to theoretical value of 8 × 8 MIMO antenna. In this work, HFSS is used to implement an eight-port MIMO antenna design, and the simulated results are accurately validated using ADS (simulation of an equivalent circuit) and measured results.