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A novel wearable monopole antenna with controlled SAR using metamaterial

Published online by Cambridge University Press:  21 April 2023

K. Ramasamy
Affiliation:
Department of Electronics and Communication Engineering, KIT KalaignarKarunanidhi Institute of Technology, Coimbatore 641402, India
B. A. Sapna*
Affiliation:
Department of Electronics and Communication Engineering, KIT KalaignarKarunanidhi Institute of Technology, Coimbatore 641402, India
M. Jayasheela
Affiliation:
Department of Electronics and Communication Engineering, KIT KalaignarKarunanidhi Institute of Technology, Coimbatore 641402, India
*
Corresponding author: B. A. Sapna, E-mail: sapna_psmi@yahoo.co.in

Abstract

This article presents a flexible wearable KIT monopole antenna for biomedical application. A metamaterial unit cell is proposed to improve the antenna performance. The proposed antenna and the metamaterial are fabricated on 1 mm-thick polydimethylsiloxane substrate to operate in the ISM frequency band of 2.45 GHz. Integration of the metamaterial improves the gain and reduces the specific absorption rate (SAR) of the antenna. The overall dimension of the antenna with the metamaterial is 49 × 49 × 19 mm3. The designed antenna is investigated for the loading effect of the body by placing on the hand phantom model. Bending tolerances are also analyzed for x and y direction with various bend radii. Gain and SAR of the proposed antenna are 4.61 dBi and 0.868 W/kg. The results of the fabricated prototype show that the proposed wearable antenna is safe for biomedical applications.

Type
Biomedical Applications
Copyright
Copyright © The Author(s), 2023. Published by Cambridge University Press in association with the European Microwave Association

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