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A compact dual-polarized co-radiator MIMO antenna for UWB applications

Published online by Cambridge University Press:  24 March 2021

Harleen Kaur ,
Hari Shankar Singh Open the ORCID record for Hari Shankar Singh [Opens in a new window]  and
Rahul Upadhyay
Harleen Kaur
Affiliation:
Department of Electronics and Communication Engineering, Thapar Institute of Engineering and Technology, Patiala-147 004, Punjab, India
Hari Shankar Singh*
Affiliation:
Department of Electronics and Communication Engineering, Thapar Institute of Engineering and Technology, Patiala-147 004, Punjab, India TIET-VT Center of Excellence for Emerging Materials (CEEMS), TIET, Patiala-147 004, Punjab, India
Rahul Upadhyay
Affiliation:
Department of Electronics and Communication Engineering, Thapar Institute of Engineering and Technology, Patiala-147 004, Punjab, India
*
Author for correspondence: Hari Shankar Singh, E-mail: harishankar1990@gmail.com
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Abstract

In this research study, a compact dual-polarized co-radiator ultra-wideband (UWB) multiple-input multiple-output (MIMO) antenna with improved impedance bandwidth and isolation is proposed for wireless applications. The designed co-radiator has an overall area of 0.3λo × 0.3λo mm2 (where, λo is free space wavelength corresponding to the lower cut-off frequency, i.e., 3.1 GHz). The proposed resonator comprises of a hybrid geometry which is created with the combinations of a circular-shaped patch, a square, and two rectangular stubs. It is centrally aligned between two 50 Ω micro-strip feed lines that are positioned orthogonal to each other. Further, the modified ground plane is attached with the end-loaded line which provides broadband isolation over entire UWB frequency band. The simulated results of the proposed antenna exhibit wideband characteristics with impedance bandwidth of 3.1–16.9 GHz with minimum isolation of −15 dB. Moreover, all the radiation performance parameters are analyzed and discussed. Some important diversity parameters such as envelope correlation coefficient, mean effective gain, effective diversity gain, and channel capacity loss have also been evaluated. Furthermore, all the measured results of proposed antenna agree well with the simulated results which make the proposed antenna a suitable candidate for UWB-MIMO wireless applications.

Keywords

Channel capacity lossdiversity gainenvelop correlation coefficientsmean effective gainmultiple-input multiple-output and ultra-wideband
Type
Antenna Design, Modeling and Measurements
Information
International Journal of Microwave and Wireless Technologies , Volume 14 , Issue 2 , March 2022 , pp. 225 - 238
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Copyright
Copyright © The Author(s), 2021. Published by Cambridge University Press in association with the European Microwave Association

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