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Diversity characteristics of four-element ring slot-based MIMO antenna for sub-6-GHz applications

  • Vipul Kaushal (Department of Electronic Science, University of Delhi South Campus) ;
  • Amit Birwal (Department of Electronic Science, University of Delhi South Campus) ;
  • Kamlesh Patel (Department of Electronic Science, University of Delhi South Campus)
  • Received : 2022.04.04
  • Accepted : 2022.11.28
  • Published : 2023.08.10
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Abstract

This paper proposes four-ring slot resonator-based MIMO antennas of 75×150 mm2 without and with CSRR structures in the sub-6-GHz range. These orthogonal-fed antennas have shown diverse characteristics with dual polarization. L-shaped parasitic structures have increased the isolation (i.e., >40 dB) in the single-element antenna over the band of 3.4 GHz-3.8 GHz. A set of three CSRR structures in the MIMO antenna reduced the coupling between antenna ports placed in an inline arrangement and enhanced the isolation from 12 dB to 20 dB and the diversity characteristics. The S-parameters of both MIMO antennas are measured and used to evaluate MIMO parameters like ECC, TARC, MEG, and channel capacity loss. The simulation results show the variations in the gain and directivity on exciting linear and dual polarizations. The diversity performance of the reported MIMO antennas is suitable for 5G applications.

Keywords

Acknowledgement

This work was supported by the Faculty Research Programme (FRP) of the Institute of Eminence (IoE) scheme of the University of Delhi (Letter ref. no. IoE/FRP/PCMS/2020/27 dated 31.12.2020).

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