Citation

Kabir, Fardin and Roslee, Mardeni and Abas, Anas and Ullah, Yasir and Tiang, Jun Jiat and Kabir, Fahmid (2025) Octagonal Patch Antenna with Modified SRR Width and Ground Slot for Sub-6 GHz Band. In: 2025 4th International Conference on Smart Cities, Automation & Intelligent Computing Systems (ICON-SONICS), 14-17 October 2025, Malacca, Malaysia.

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Abstract

This paper presents a miniaturized patch antenna that integrates an octagonal split-ring resonator (SRR) and a square-slot defected ground structure (DGS) for sub-6 GHz wireless applications. Designed on an FR-4 substrate (εr= 4.3, thickness =1.6 mm), the antenna achieves a compact 10×10×1.6 mm3 footprint, which is significantly smaller than conventional patch designs. The optimized configuration operates across 4.20−7.05 GHz, covering upper sub-6 GHz 5G New Radio (NR), Wi-Fi 6/6E, and IoT frequency bands. The SRR enhances electromagnetic coupling, while the DGS improves impedance matching and bandwidth by suppressing unwanted resonances. Simulations indicate a return loss of −31 dB at 5.9 GHz, a wide impedance bandwidth of 2.85 GHz, and a peak gain of −2.8 dBi. Although the gain is modest compared with larger antennas, it is sufficient for short-range IoT gateways, smart sensors, and compact 5G devices, where small form factor and wideband compliance is more critical than high directive gain. The results demonstrate that SRR- and DGS-based techniques provide an effective approach for antenna miniaturization and wideband operation, offering a promising solution for next-generation compact wireless systems.

Item Type:	Conference or Workshop Item (Paper)
Uncontrolled Keywords:	Sub-6 GHz antenna, octagonal patch, split ring resonator (SRR), defected ground structure (DGS), IoT applications
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5101-6720 Telecommunication. Including telegraphy, telephone, radio, radar, television
Divisions:	Faculty of Artificial Intelligence & Engineering (FAIE)
Depositing User:	Ms Suzilawati Abu Samah
Date Deposited:	19 Mar 2026 02:37
Last Modified:	19 Mar 2026 02:37
URII:	http://shdl.mmu.edu.my/id/eprint/15614

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