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

Published online by Cambridge University Press:  15 July 2022

Tathababu Addepalli Open the ORCID record for Tathababu Addepalli [Opens in a new window] ,
T. Vidyavathi ,
K. Neelima ,
M. Sharma Open the ORCID record for M. Sharma [Opens in a new window]  and
D. Kumar
Tathababu Addepalli
Affiliation:
Department of ECE, JNTUA, Anantapur, AP, India Department of ECE, Aditya Engineering College (A), Surampalem, Kakinada, AP, India
T. Vidyavathi
Affiliation:
Department of ECE, Gayatri Vidya Parishad College of Engineering (A), Visakhapatnam, AP, India
K. Neelima
Affiliation:
Department of ECE, Sree Vidyanikethan Engineering College (A), Tirupati, AP, India
M. Sharma*
Affiliation:
Chitkara University Institute of Engineering and Technology, Chitkara University, Rajpura, Punjab, India
D. Kumar
Affiliation:
Department of Physics and Electronics, Rajdhani College (University of Delhi), Delhi, India
*
Author for correspondence: M. Sharma, E-mail: manishengineer1978@gmail.com
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Abstract

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.

Keywords

Diversity performancefour-port MIMO5G-NRn77n78n79
Type
Antenna Design, Modeling and Measurements
Information
International Journal of Microwave and Wireless Technologies , Volume 15 , Issue 4 , May 2023 , pp. 683 - 697
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Copyright
© The Author(s), 2022. Published by Cambridge University Press in association with the European Microwave Association

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