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A compact flexible textile artificial magnetic conductor-based wearable monopole antenna for low specific absorption rate wrist applications

Published online by Cambridge University Press:  02 June 2020

Mohamed El Atrash Open the ORCID record for Mohamed El Atrash [Opens in a new window] ,
Mahmoud A. Abdalla Open the ORCID record for Mahmoud A. Abdalla [Opens in a new window]  and
Hadia M. Elhennawy Open the ORCID record for Hadia M. Elhennawy [Opens in a new window]
Mohamed El Atrash*
Affiliation:
Department of Electronics and Communications, Ain Shams University, Abbasseya, Cairo, Egypt
Mahmoud A. Abdalla
Affiliation:
Electromagnetic Waves Group, Department of Electronic Engineering, Military Technical College, Cairo, Egypt
Hadia M. Elhennawy
Affiliation:
Department of Electronics and Communications, Ain Shams University, Abbasseya, Cairo, Egypt
*
Author for correspondence: Mohamed El Atrash, E-mail: mzaky@msa.eun.eg
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Abstract

A compact monopole antenna backed with a 1 × 2 textile-based artificial magnetic conductor (AMC) array is proposed. Textile was mainly selected for the AMC materials according to an investigation that took place between different AMC substrate materials, where it was settled that the textile one displayed the highest antenna gain and efficiency. The monopole antenna and the AMC, distanced apart by 5 mm, combined form the integrated design. It operates at 2.4 GHz, which was particularly selected as the resonant frequency for wirelessly sending the subject's symptoms data via Wi-Fi, with realized gain and total efficiency of 6.76 dBi and 88.4%, respectively, in free space. Separated by 3 mm from the specific anthropomorphic mannequin human hand model, it displays a realized gain and total efficiency of 4.06 dBi and 44.39%, respectively, in a flat condition. Furthermore, it exhibits a specific absorption rate (SAR) of 1.8 W/kg averaged over 10 g of tissue. When bent over the human hand model, it performs well and exhibits a maximum SAR of 0.521 and 0.406 W/kg, averaged over 1 and 10 g of tissues, respectively. As a result of such outcomes, the proposed integrated design can be nominated for wearable hand/wrist and Wi-Fi applications.

Keywords

Low SARtextile AMCwearable flexible antennawrist applications
Type
Metamaterials and Photonic Bandgap Structures
Information
International Journal of Microwave and Wireless Technologies , Volume 13 , Issue 2 , March 2021 , pp. 119 - 125
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Copyright
Copyright © Cambridge University Press and the European Microwave Association 2020

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