Enhanced bandwidth and resonance optimization of a flexible microstrip antenna for ISM applications

Mohamad, Sarah Yasmin and Rahimi, Aiman Hakimi and Abdul Malek, Norun Farihah and Mohd. Isa, Farah Nadia and Chin, Kuo-Sheng and Kamardin, Kamilia (2025) Enhanced bandwidth and resonance optimization of a flexible microstrip antenna for ISM applications. In: 2025 IEEE 13th Asia-Pacific Conference on Antennas and Propagation (APCAP), 3-7 August 2025, Christchurch, New Zealand.

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Abstract

This paper presents the analysis and optimization of a flexible microstrip antenna to enhance its electrical performance for Industrial, Scientific, and Medical (ISM) band applications. The proposed design integrates inset slots on both the patch and ground plane, along with parasitic elements, to improve resonant frequency and bandwidth. Fabricated on Rogers RO4003C (εr=3.55) with dimensions of 20×25×0.2032mm3, the antenna operates within the 5.725−5.875GHz ISM band. Experimental results demonstrate an S11 of −37.05 dB at 5.78 GHz and a bandwidth of 158MHz(5.739−5.897GHz), covering 90.67 % of the ISM band. Theoretical, simulation, and experimental analyses confirm that embedding slots and parasitic elements significantly enhances performance. Additionally, the antenna maintains stable functionality under bending conditions, making it suitable for wearable and wireless body-area network (WBAN) applications. With its flexibility, optimized resonance, and broad bandwidth, the proposed antenna offers a robust solution for efficient and high-speed data transmission in ISM band communication systems.

Item Type:	Proceeding Paper (Plenary Papers)
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:	05 Nov 2025 10:07
Last Modified:	05 Nov 2025 10:07
URI:	http://irep.iium.edu.my/id/eprint/124092

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