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Design of a compact sigma slotted dual-mode UWB antenna for wireless body area network applications

Published online by Cambridge University Press:  23 August 2023

P. Venkatesh Open the ORCID record for P. Venkatesh [Opens in a new window]  and
T. V. Narmadha
P. Venkatesh*
Affiliation:
Department of Electronics and Communication Engineering, Ramco Institute of Technology, Rajapalayam, India
T. V. Narmadha
Affiliation:
Department of Electrical and Electronics Engineering, St. Joseph’s College of Engineering, Chennai, India
*
Corresponding author: P. Venkatesh; Email: venkateshp286@gmail.com
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Abstract

This article presents the design of a novel sigma slotted circular monopole antenna for wireless body area network applications. The design is proceeded with a sigma-shaped slot etched on the circular radiator with Rogers 4003C substrate. The size of the proposed antenna is 30 × 30 × 1 mm3. With partial ground plane, the bandwidth characteristics of the antenna have been enhanced. The designed antenna covers 2–10 GHz of the ultra wideband, thereby providing more than 106% bandwidth. The antenna exhibits high gain values of 1.95, 3.23, 3.46, and 5.95 dB at 2.45, 3.45, 5.8, and 9.5 GHz, respectively. The proposed design operates on off-body mode at 2.45 GHz and on-body mode at 5.8 GHz, thus acting as a dual-mode antenna. To ensure the health and safety measure, specific absorption rate analysis was done for both low and high values of input power and also with Cartesian and cylindrical human arm models. Bending analysis was also done. The time domain parameter group delay was also analyzed for the proposed antenna for on- and off-body scenarios. The prototype was fabricated, and validation of simulation results was done for free space and on-body scenarios.

Keywords

dual modegroup delaysigma slotspecific absorption ratewireless body area networks
Type
Biomedical Application
Information
International Journal of Microwave and Wireless Technologies , Volume 16 , Issue 2 , March 2024 , pp. 203 - 216
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Copyright
© The Author(s), 2023. Published by Cambridge University Press in association with The European Microwave Association

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