Enhanced Bandwidth and Resonance Optimization of a Flexible Microstrip Antenna for ISM Applications

Aiman H. Rahimi; Sarah Y. Mohamad; Norun F.A. Malek; Farah N. Isa; Kuo S. Chin; Kamilia Kamardin

doi:10.1109/APCAP65837.2025.11210537

Enhanced Bandwidth and Resonance Optimization of a Flexible Microstrip Antenna for ISM Applications

Aiman H. Rahimi
, Sarah Y. Mohamad
, Norun F.A. Malek
, Farah N. Isa
, Kuo S. Chin
, Kamilia Kamardin

Department of Electronic Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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 × 0.2032 mm³, the antenna operates within the 5.725-5.875 GHz ISM band. Experimental results demonstrate an S₁₁ of -37.05 dB at 5.78 GHz and a bandwidth of 158 MHz (5.739-5.897 GHz), 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.

Original language	English
Title of host publication	Proceedings of the 13th Asia-Pacific Conference on Antennas and Propagation, APCAP 2025
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	160-161
Number of pages	2
ISBN (Electronic)	9798331537777
DOIs	https://doi.org/10.1109/APCAP65837.2025.11210537
State	Published - 2025
Event	13th IEEE Asia-Pacific Conference on Antennas and Propagation, APCAP 2025 - Christchurch, New Zealand Duration: 03 08 2025 → 07 08 2025

Publication series

Name	Proceedings of the 13th Asia-Pacific Conference on Antennas and Propagation, APCAP 2025

Conference

Conference	13th IEEE Asia-Pacific Conference on Antennas and Propagation, APCAP 2025
Country/Territory	New Zealand
City	Christchurch
Period	03/08/25 → 07/08/25

Bibliographical note

Publisher Copyright:
© 2025 IEEE.

Keywords

bandwidth enhancement
flexible antenna
ISM band
resonant frequency optimization

Access to Document

10.1109/APCAP65837.2025.11210537

Cite this

Rahimi, A. H., Mohamad, S. Y., Malek, N. F. A., Isa, F. N., Chin, K. S., & Kamardin, K. (2025). Enhanced Bandwidth and Resonance Optimization of a Flexible Microstrip Antenna for ISM Applications. In Proceedings of the 13th Asia-Pacific Conference on Antennas and Propagation, APCAP 2025 (pp. 160-161). (Proceedings of the 13th Asia-Pacific Conference on Antennas and Propagation, APCAP 2025). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/APCAP65837.2025.11210537

Rahimi, Aiman H. ; Mohamad, Sarah Y. ; Malek, Norun F.A. et al. / Enhanced Bandwidth and Resonance Optimization of a Flexible Microstrip Antenna for ISM Applications. Proceedings of the 13th Asia-Pacific Conference on Antennas and Propagation, APCAP 2025. Institute of Electrical and Electronics Engineers Inc., 2025. pp. 160-161 (Proceedings of the 13th Asia-Pacific Conference on Antennas and Propagation, APCAP 2025).

@inproceedings{3d0e35f3de6e403baa0642659f335f59,

title = "Enhanced Bandwidth and Resonance Optimization of a Flexible Microstrip Antenna for ISM Applications",

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 × 0.2032 mm3, the antenna operates within the 5.725-5.875 GHz ISM band. Experimental results demonstrate an S11 of -37.05 dB at 5.78 GHz and a bandwidth of 158 MHz (5.739-5.897 GHz), 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.",

keywords = "bandwidth enhancement, flexible antenna, ISM band, resonant frequency optimization",

author = "Rahimi, \{Aiman H.\} and Mohamad, \{Sarah Y.\} and Malek, \{Norun F.A.\} and Isa, \{Farah N.\} and Chin, \{Kuo S.\} and Kamilia Kamardin",

note = "Publisher Copyright: {\textcopyright} 2025 IEEE.; 13th IEEE Asia-Pacific Conference on Antennas and Propagation, APCAP 2025 ; Conference date: 03-08-2025 Through 07-08-2025",

year = "2025",

doi = "10.1109/APCAP65837.2025.11210537",

language = "英语",

series = "Proceedings of the 13th Asia-Pacific Conference on Antennas and Propagation, APCAP 2025",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

pages = "160--161",

booktitle = "Proceedings of the 13th Asia-Pacific Conference on Antennas and Propagation, APCAP 2025",

address = "美国",

}

Rahimi, AH, Mohamad, SY, Malek, NFA, Isa, FN, Chin, KS & Kamardin, K 2025, Enhanced Bandwidth and Resonance Optimization of a Flexible Microstrip Antenna for ISM Applications. in Proceedings of the 13th Asia-Pacific Conference on Antennas and Propagation, APCAP 2025. Proceedings of the 13th Asia-Pacific Conference on Antennas and Propagation, APCAP 2025, Institute of Electrical and Electronics Engineers Inc., pp. 160-161, 13th IEEE Asia-Pacific Conference on Antennas and Propagation, APCAP 2025, Christchurch, New Zealand, 03/08/25. https://doi.org/10.1109/APCAP65837.2025.11210537

Enhanced Bandwidth and Resonance Optimization of a Flexible Microstrip Antenna for ISM Applications. / Rahimi, Aiman H.; Mohamad, Sarah Y.; Malek, Norun F.A. et al.
Proceedings of the 13th Asia-Pacific Conference on Antennas and Propagation, APCAP 2025. Institute of Electrical and Electronics Engineers Inc., 2025. p. 160-161 (Proceedings of the 13th Asia-Pacific Conference on Antennas and Propagation, APCAP 2025).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Enhanced Bandwidth and Resonance Optimization of a Flexible Microstrip Antenna for ISM Applications

AU - Rahimi, Aiman H.

AU - Mohamad, Sarah Y.

AU - Malek, Norun F.A.

AU - Isa, Farah N.

AU - Chin, Kuo S.

AU - Kamardin, Kamilia

PY - 2025

Y1 - 2025

N2 - 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 × 0.2032 mm3, the antenna operates within the 5.725-5.875 GHz ISM band. Experimental results demonstrate an S11 of -37.05 dB at 5.78 GHz and a bandwidth of 158 MHz (5.739-5.897 GHz), 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.

AB - 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 × 0.2032 mm3, the antenna operates within the 5.725-5.875 GHz ISM band. Experimental results demonstrate an S11 of -37.05 dB at 5.78 GHz and a bandwidth of 158 MHz (5.739-5.897 GHz), 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.

KW - bandwidth enhancement

KW - flexible antenna

KW - ISM band

KW - resonant frequency optimization

UR - https://www.scopus.com/pages/publications/105022429797

U2 - 10.1109/APCAP65837.2025.11210537

DO - 10.1109/APCAP65837.2025.11210537

M3 - 会议稿件

AN - SCOPUS:105022429797

T3 - Proceedings of the 13th Asia-Pacific Conference on Antennas and Propagation, APCAP 2025

SP - 160

EP - 161

BT - Proceedings of the 13th Asia-Pacific Conference on Antennas and Propagation, APCAP 2025

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 13th IEEE Asia-Pacific Conference on Antennas and Propagation, APCAP 2025

Y2 - 3 August 2025 through 7 August 2025

ER -

Rahimi AH, Mohamad SY, Malek NFA, Isa FN, Chin KS, Kamardin K. Enhanced Bandwidth and Resonance Optimization of a Flexible Microstrip Antenna for ISM Applications. In Proceedings of the 13th Asia-Pacific Conference on Antennas and Propagation, APCAP 2025. Institute of Electrical and Electronics Engineers Inc. 2025. p. 160-161. (Proceedings of the 13th Asia-Pacific Conference on Antennas and Propagation, APCAP 2025). doi: 10.1109/APCAP65837.2025.11210537

Enhanced Bandwidth and Resonance Optimization of a Flexible Microstrip Antenna for ISM Applications

Abstract

Publication series

Conference

Bibliographical note

Keywords

Access to Document

Other files and links

Fingerprint

Cite this