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Mutual Coupling Reduction in MIMO DRA through Metamaterials.

Muhammad Sabir Khan1, Shahid Khan1, Owais Khan1

  • 1Department of Electrical and Computer Engineering, COMSATS University Islamabad, Abbottabad-Campus, Abbottabad 22060, Pakistan.

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|September 28, 2023
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Summary

This study introduces hexagonal split-ring resonators (H-SRRs) to reduce mutual coupling in multiple-input multiple-output (MIMO) dielectric resonator antennas (DRAs). The metamaterial integration significantly enhances antenna performance for wireless applications.

Keywords:
MIMOdielectric resonator antennametamaterialmutual couplingsplit-ring resonator

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Area of Science:

  • Electromagnetics and Metamaterials
  • Antenna Engineering
  • Wireless Communication Systems

Background:

  • Mutual coupling in antenna arrays degrades performance.
  • Dielectric resonator antennas (DRAs) are widely used but susceptible to coupling.
  • Metamaterials offer novel solutions for electromagnetic interference reduction.

Purpose of the Study:

  • To investigate the use of single-negative metamaterial structures for mutual coupling reduction in MIMO DRAs.
  • To design and analyze a MIMO DRA integrated with hexagonal split-ring resonators (H-SRRs).
  • To achieve significant mutual coupling reduction without compromising antenna performance.

Main Methods:

  • Integration of hexagonal split-ring resonators (H-SRRs) between antenna elements.
  • Utilizing a meta-surface composed of H-SRR unit cells.
  • Employing an air gap to match simulated and measured results.
  • Performance analysis including mutual impedance, directivity, and correlation coefficients.

Main Results:

  • A 30 dB reduction in mutual coupling was achieved by integrating H-SRRs.
  • The design operates effectively in the 5.9-6.1 GHz band.
  • Mutual impedance remained better than 30 dB.
  • Achieved directivity (DG) of 10 dB, with low ECC and CCL.

Conclusions:

  • The proposed H-SRR integrated MIMO DRA effectively reduces mutual coupling.
  • The design demonstrates robust performance suitable for wireless applications.
  • Metamaterial integration provides a viable strategy for enhancing antenna array performance.