Asymmetrical fed Calendula flower-shaped four-port 5G-NR band (n77, n78, and n79) MIMO antenna with high diversity performance

This research reports a four-port multiple-input-multiple-output (MIMO) antenna designed for 5G-NR band applications including n77: 3.30–4.20 GHz, n78: 3.30–3.80 GHz, and n79: 4.40–5.00 GHz. The proposed design is analyzed in two parts, one single-element asymmetrical fed Calendula flower-shaped ant...

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Bibliographic Details
Published inInternational journal of microwave and wireless technologies Vol. 15; no. 4; pp. 683 - 697
Main Authors Addepalli, Tathababu, Vidyavathi, T., Neelima, K., Sharma, M., Kumar, D.
Format Journal Article
LanguageEnglish
Published Cambridge, UK Cambridge University Press 01.05.2023
Subjects
Antenna design
Antenna Design, Modeling and Measurements
Antennas
Asymmetry
Bandwidths
Design
Dipoles
Fractals
Impedance matching
MIMO communication
Radiation
Diversity performance
n79
5G-NR
n78
four-port MIMO
n77
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Summary:This research reports a four-port multiple-input-multiple-output (MIMO) antenna designed for 5G-NR band applications including n77: 3.30–4.20 GHz, n78: 3.30–3.80 GHz, and n79: 4.40–5.00 GHz. The proposed design is analyzed in two parts, one single-element asymmetrical fed Calendula flower-shaped antenna and the other four-port modified MIMO antenna with the connected ground. The evolution of the MIMO antenna is studied based on the characteristics and optimized single-element antenna. The measured 5G-NR bandwidth offers a very high matching of impedance for MIMO configuration and higher isolation in the same band. The MIMO antenna offers an average peak gain of 3.51 dBi with a radiation efficiency of more than 90%. The radiation patterns plotted at 3.51, 4.00, 4.50, and 5.00 GHz match with almost omni-directional and dipole patterns in H- and E-radiating planes respectively. The MIMO antenna also records good diversity performance (ECC, DG, CCL, MEG, and TARC) in n77, n78, and n79 5G bands.
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ISSN:1759-0787
1759-0795
DOI:10.1017/S1759078722000800