Design and optimization of a flexible antenna for ISM band wearable devices via inset slot integration and parasitic elements

Rahimi, Aiman Hakimi and Mohamad, Sarah Yasmin and Abdul Malek, Norun Farihah and Mohd. Isa, Farah Nadia and Jusoh, Ahmad Zamani and Hassan Abdalla Hashim, Aisha (2025) Design and optimization of a flexible antenna for ISM band wearable devices via inset slot integration and parasitic elements. IIUM Engineering Journal, 26 (2). pp. 155-168. ISSN 1511-788X

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Abstract

This paper aims to analyze and optimize the electrical properties of a flexible antenna to maximize its potential. The antenna's performance is enhanced by incorporating inset slots on both the patch and ground plane, as well as utilizing parasitic elements to improve the resonant frequency and achieve a wider bandwidth. The flexible antenna is designed to resonate within the Industrial, Scientific, and Medical (ISM) frequency band of 5.725–5.875 GHz, using Rogers RO4003C with a dielectric constant of 3.55 and dimensions of 20 × 25 × 0.2032 mm³. The proposed antenna demonstrates promising results, with S11 of -37.05 dB at 5.78 GHz, and a bandwidth of 158 MHz, ranging from 5.739–5.897 GHz. The usable ISM bandwidth is 136 MHz, representing 90.67% of the ISM frequency band. Theoretical, simulation, and experimental analyses confirm that embedding slots on the patch or ground plane, along with the use of parasitic elements, significantly enhances the antenna's resonant frequency, bandwidth, and efficiency. Because of its flexibility, improved resonant frequency, and wide bandwidth, this antenna has potential uses in the ISM frequency band to enable faster and more efficient data transmission.

Item Type:	Article (Journal)
Uncontrolled Keywords:	Flexible microstrip antenna, inset slots, parasitic elements, industrial, scientific, and medical (ISM) band.
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5101 Telecommunication. Including telegraphy, radio, radar, television
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Electrical and Computer Engineering
Depositing User:	Dr Sarah Yasmin Mohamad
Date Deposited:	16 May 2025 17:32
Last Modified:	16 May 2025 17:32
URI:	http://irep.iium.edu.my/id/eprint/121092

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