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Design of UWB MIMO antenna using lean wearable textile substrate for reduced SAR

Sasireka Perumalsamy (Department of Electronics and Communication Engineering, S.A. Engineering College, Chennai, India)
Kavya G. (Department of Electronics and Communication Engineering, S.A. Engineering College, Chennai, India)
Rajkumar S. (HCL Technologies Ltd Chennai, Chennai, India)

Microelectronics International

ISSN: 1356-5362

Article publication date: 12 October 2023

Issue publication date: 15 May 2024

45

Abstract

Purpose

This paper aims to propose a two-element dual fed ultra-wideband (UWB) multiple input multiple output (MIMO) antenna system with no additional decoupling structures. The antenna operates from 3.1 to 10.6 GHz. The antenna finds its usage in on-body wearable device applications.

Design/methodology/approach

The antenna system measures 63.80 × 29.80 × 0.7 mm. The antenna radiating element is designed by using a modified dumbbell-shaped structure. Jean cloth material is used as substrate. The isolation improvement is achieved through spacing between two elements.

Findings

The proposed antenna has a very low mutual coupling of S21 < −20 dB and impedance matching of S11 < −10 dB. The radiation characteristics are stable in the antenna operating region. It provides as ECC < 0.01, diversity gain >9.9 dB. The antenna offers low average specific absorption rate (SAR) of 0.169 W/kg. The simulated and measured results are found to be in reasonable match.

Originality/value

The MIMO antenna is proposed for on-body communication, hence, a very thin jean cloth material is used as substrate. This negates the necessity of additional material usage in antenna design and the result range indicates good diversity performance and with a low SAR of 0.169 W/kg for on-body performance. This makes it a suitable candidate for textile antenna application.

Keywords

Acknowledgements

The authors would like to thank Dr T Godhavari of Antenna Research Laboratory, Department of ECE, and Dr. M.G.R University, Chennai. for simulation support of the UWB Antenna.

Conflicts of interest: The authors declare that they have no conflict of interest.

Citation

Perumalsamy, S., G., K. and S., R. (2024), "Design of UWB MIMO antenna using lean wearable textile substrate for reduced SAR", Microelectronics International, Vol. 41 No. 3, pp. 142-148. https://doi.org/10.1108/MI-08-2023-0176

Publisher

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Emerald Publishing Limited

Copyright © 2023, Emerald Publishing Limited

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