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Ultra-Compact 4-Port MIMO Antenna with Defected Ground Structure and SAR Analysis for 28/38 GHz 5G Mobile Devices

Author

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  • Rania Hamdy Elabd
  • Ahmed Jamal Abdullah Al-Gburi

Abstract

To tackle the challenge of keeping 5G mobile devices compact while supporting millimeter-wave bands, we've created an ultra-compact 4-port dual-band MIMO antenna with a defected ground structure (DGS). This design minimizes mutual coupling and covers a broad frequency range. Built on a Rogers TMM4 substrate with dimensions of 17.76×17.76 mm2, the antenna includes four planar patch antennas positioned perpendicularly at the corners. Each antenna operates at 28/38 GHz and features a rectangular patch with four rectangular slots and a full ground plane. The patches are separated by 0.5 λo, with the DGS further reducing mutual coupling. Both simulations and measurements indicate a significant reduction in mutual coupling (−39 to −60 dB), improving ECC, TARC, MEG, and DG. Time-domain and SAR analyses confirm the antenna's efficiency and its suitability for 5G devices.

Suggested Citation

  • Rania Hamdy Elabd & Ahmed Jamal Abdullah Al-Gburi, 2024. "Ultra-Compact 4-Port MIMO Antenna with Defected Ground Structure and SAR Analysis for 28/38 GHz 5G Mobile Devices," Journal of Electromagnetic Waves and Applications, Taylor & Francis Journals, vol. 38(9), pages 1000-1025, June.
    • Handle: RePEc:taf:tewaxx:v:38:y:2024:i:9:p:1000-1025
    DOI: 10.1080/09205071.2024.2354716
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