A 28 ghz broadband helical inspired end-fire antenna and its mimo configuration for 5g pattern diversity applications

Hijab Zahra*, Wahaj Abbas Awan, Wael Abd Ellatif Ali, Niamat Hussain, Syed Muzahir Abbas, Subhas Mukhopadhyay

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)
50 Downloads (Pure)


In this paper, an end-fire antenna for 28 GHz broadband communications is proposed with its multiple-input-multiple-output (MIMO) configuration for pattern diversity applications in 5G communication systems and the Internet of Things (IoT). The antenna comprises a simple geo-metrical structure inspired by a conventional planar helical antenna without utilizing any vias. The presented antenna is printed on both sides of a very thin high-frequency substrate (Rogers RO4003, εr = 3.38) with a thickness of 0.203 mm. Moreover, its MIMO configuration is characterized by reasonable gain, high isolation, good envelope correlation coefficient, broad bandwidth, and high diversity gain. To verify the performance of the proposed antenna, it was fabricated and verified by experimental measurements. Notably, the antenna offers a wide −10 dB measured impedance rang-ing from 26.25 GHz to 30.14 GHz, covering the frequency band allocated for 5G communication systems with a measured peak gain of 5.83 dB. Furthermore, a performance comparison with the state-of-the-art mm-wave end-fire antennas in terms of operational bandwidth, electrical size, and various MIMO performance parameters shows the worth of the proposed work.

Original languageEnglish
Article number405
Pages (from-to)1-15
Number of pages15
Issue number4
Publication statusPublished - 2 Feb 2021

Bibliographical note

Copyright the Author(s) 2021. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.


  • 28 GHz
  • end-fire antenna
  • millimeter-wave communication
  • IoT
  • Internet of things
  • 5G antenna


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