Skip to main content
SpringerLink
Log in

A Compact Semi-circular Slot MIMO Antenna with Enhanced Isolation for Sub-6 GHz 5G WLAN Applications

  • Published:
Wireless Personal Communications Aims and scope Submit manuscript

Abstract

In this paper, a novel compact semi-circular slot (SCS) 2 × 2 MIMO antenna is presented for 5G NR sub-6 GHz applications with high isolation. The proposed antenna consists of a semi-circular slot in ground plane, U-shaped stub, and 50-ohm microstrip feed line. The novelty of this paper are the Semi-Circular Slot acts a radiator, the port isolation  is enhanced using a simple conductor strip as a neutralization line, very compact in size, low ECC, and good impedance matching. The overall size of the proposed SCS MIMO antenna is 16 mm x 21 mm, and FR4 substrate is used with thickness of 1.6 mm. The two SCS antenna elements are separated by edge-to-edge distance of 1mm (\(=0.019\lambda _{0}\)). The proposed compact MIMO antenna design is simulated using Ansys HFSS. To validate SCS MIMO antenna, a prototype was fabricated and tested. The measured results are attained at 5.5 GHz with isolation greater than 25dB, impedance bandwidth (S11\(<-10\) dB) covers from 5.10 GHz to 5.80 GHz with return loss of − 39.5 dB. The MIMO antenna parameters, ECC, CCL, TARC, and MEG are studied, and the values are obtained within acceptable limits. The measured and simulated antenna results are almost similar. This compact MIMO antenna is suitable for 5G communications in sub-6 GHz wifi-5 band applications.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9
Fig. 10
Fig. 11
Fig. 12
Fig. 13

Similar content being viewed by others

Data Availabilty

All the data is available in the manuscript

Code Availabilty

Not applicable.

References

  1. Pandit, S., Mohan, A., & Ray, P. (2018). A compact four-element MIMO antenna for WLAN applications. Microwave and Optical Technology Letters, 60(2), 289–295. https://doi.org/10.1002/mop.30961

    Article  Google Scholar 

  2. Chouhan, S., Panda, D. K., Gupta, M., & Singhal, S. (2018). Meander line MIMO antenna for 5.8 GHz WLAN application. International Journal of RF and Microwave Computer-Aided Engineering, 28(4), e21222. https://doi.org/10.1002/mmce.21222

  3. Nandi, S., & Mohan, A. (2017). A compact dual-band MIMO slot antenna for WLAN applications. IEEE Antennas and Wireless Propagation Letters, 16, 2457–2460. https://doi.org/10.1109/LAWP.2017.2723927.

    Article  Google Scholar 

  4. Cui, S., Liu, Y., Jiang, W., & Gong, S. X. (2011). Compact dual-band monopole antennas with high port isolation. Electronics Letters, 47(10), 579–580. https://doi.org/10.1049/el.2010.3603

    Article  Google Scholar 

  5. Mark, R., Singh, H. V., Mandal, K., & Das, S. (2019). Reduced edge-to-edge spaced MIMO antenna using parallel coupled line resonator for WLAN applications. Microwave and Optical Technology Letters, 61(10), 2374–2380. https://doi.org/10.1002/mop.31911

    Article  Google Scholar 

  6. Chouhan, S., & Malviya, L. (2019). Two element folded meander line MIMO antenna for Wireless applications. Electronics, 23(1), 11–17. https://doi.org/10.7251/ELS1923011C

    Article  Google Scholar 

  7. Khan, A., Geng, S., Zhao, X., Shah, Z., Jan, M. U., & Abdelbaky, M. A. (2020). Design of MIMO antenna with an enhanced isolation technique. Electronics, 9(8), 1217. https://doi.org/10.3390/electronics9081217

    Article  Google Scholar 

  8. Maturi, T., & Harikrishna, B. (2020). Electronic band-gap integrated low mutual coupling dual-band MIMO antenna. International Journal of Electronics, 107(7), 1166–1176. https://doi.org/10.1080/00207217.2020.1726483

    Article  Google Scholar 

  9. Kulkarni, J., Desai, A., & Sim, C. Y. D. (2021). Wideband Four-Port MIMO antenna array with high isolation for future wireless systems. AEU-International Journal of Electronics and Communications, 128, 153507. https://doi.org/10.1016/j.aeue.2020.153507

    Article  Google Scholar 

  10. Aouadi, B., & Tahar, J. B. (2015). Requirements analysis of dual band MIMO antenna. Wireless Personal Communications, 82(1), 35–45. https://doi.org/10.1007/s11277-014-2190-4

    Article  Google Scholar 

  11. Stutzman, W. L., & Thiele, G. A. (2012). Antenna theory and design. New York: Wiley.

    Google Scholar 

  12. Ghannad, A. A., Khalily, M., Xiao, P., Tafazolli, R., & Kishk, A. A. (2019). Enhanced matching and vialess decoupling of nearby patch antennas for MIMO system. IEEE Antennas and Wireless Propagation Letters, 18(6), 1066–1070. https://doi.org/10.1109/LAWP.2019.2906308

    Article  Google Scholar 

  13. Sharma, V., Upadhayay, M. D., Singh, A. V., & Prajapati, J. (2021). Hammer-shaped element-based compact MIMO antenna for WLAN application. Progress in Electromagnetics Research Letters, 97, 121–130. https://doi.org/10.2528/PIERL21031604.

    Article  Google Scholar 

  14. Kulkarni, J., & Deshpande, V. (2020, December). Low-Profile, Compact, Two Port MIMO Antenna Conforming Wi-Fi-5/Wi-Fi-6/V2X/DSRC/INSAT-C for Wireless Industrial Applications. In 2020 IEEE 17th India Council International Conference (INDICON) (pp. 1–5). IEEE. https://doi.org/10.1109/INDICON49873.2020.9342514

  15. Sree, G. N. J., & Nelaturi, S. (2021). Design and experimental verification of fractal based MIMO antenna for lower sub 6-GHz 5G applications. AEU-International Journal of Electronics and Communications, 137, 153797. https://doi.org/10.1016/j.aeue.2021.153797

    Article  Google Scholar 

  16. Hsu, C. Y., Hwang, L. T., Chang, F. S., Wang, S. M., & Liu, C. F. (2016). Investigation of a single-plate pi-shaped multiple-input-multiple-output antenna with enhanced port isolation for 5 GHz band applications. IET Microwaves, Antennas & Propagation, 10(5), 553–560. https://doi.org/10.1049/iet-map.2015.0511

    Article  Google Scholar 

  17. Kulkarni, J., Desai, A., & Sim, C. Y. D. (2021). Two port CPW-fed MIMO antenna with wide bandwidth and high isolation for future wireless applications. International Journal of RF and Microwave Computer-Aided Engineering. https://doi.org/10.1002/mmce.22700.

    Article  Google Scholar 

  18. Singh, H. V., Tripathi, S., & Mohan, A. (2021). Closely-coupled MIMO antenna with high wideband isolation using decoupling circuit. AEU-International Journal of Electronics and Communications. https://doi.org/10.1016/j.aeue.2021.153833.

    Article  Google Scholar 

  19. Ghosh, C. K., Pratap, M., Kumar, R., & Pratap, S. (2020). Mutual coupling reduction of microstrip MIMO antenna using microstrip resonator. Wireless Personal Communications, 112(3), 2047–2056. https://doi.org/10.1007/s11277-020-07138-z

    Article  Google Scholar 

  20. Kulkarni, S., & Kunte, A. (2021). Design of V-cut patch MIMO antenna for the 5.4 GHz band. Wireless Personal Communications. https://doi.org/10.1007/s11277-021-08872-8.

    Article  Google Scholar 

  21. Kaur, N., Kaur, J., & Sharma, S. (2021). MIMO antenna system with self isolation characteristics for GSM and sub-6 GHz 5G applications. Wireless Personal Communications. https://doi.org/10.1007/s11277-021-08500-5.

    Article  Google Scholar 

  22. Saxena, G., Awasthi, Y. K., & Jain, P. (2021). Four-element pentaband MIMO antenna for multiple wireless application including dual-band circular polarization characteristics. International Journal of Microwave and Wireless Technologies. https://doi.org/10.1017/S1759078721000593.

    Article  Google Scholar 

  23. Singh, H., Sohi, B. S., & Gupta, A. (2021). Designing and performance evaluation of metamaterial inspired antenna for 4G and 5G applications. International Journal of Electronics, 108(6), 1035–1057. https://doi.org/10.1080/00207217.2020.1819438

    Article  Google Scholar 

  24. Wang, S., Li, K., Kong, F., & Du, L. (2021). A miniaturized triple-band planar antenna combing single-cell metamaterial structure and defected ground plane for WLAN/WiMAX applications. Journal of Electromagnetic Waves and Applications, 35(3), 357–370. https://doi.org/10.1080/09205071.2020.1839569

    Article  Google Scholar 

Download references

Funding

Not Applicable.

Author information

Authors and Affiliations

  1. ECE, Sreenidhi Institute of Science and Technology, Yamnampet, Hyderabad, Telangana, 501301, India

    Pendli Pradeep

  2. ECE, Mahatma Gandhi Institute of Technology, Gandipet, Hyderabad, Telangana, 500075, India

    K. Jaya Sankar

  3. ECE, University College of Engineering, Osmania University, Taranaka, Hyderabad, Telangana, 500007, India

    P. Chandra Sekhar

Authors
  1. Pendli Pradeep
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. K. Jaya Sankar
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. P. Chandra Sekhar
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Pendli Pradeep.

Ethics declarations

Conflict of interest

The authors declare that they have no knowledge competing financial interests or personal relationships that could have appeared to incluence the work reported in this paper.

Additional information

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Pradeep, P., Jaya Sankar, K. & Chandra Sekhar, P. A Compact Semi-circular Slot MIMO Antenna with Enhanced Isolation for Sub-6 GHz 5G WLAN Applications. Wireless Pers Commun 125, 3683–3698 (2022). https://doi.org/10.1007/s11277-022-09730-x

Download citation

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s11277-022-09730-x

Keywords

Search

Navigation