Compact wideband antenna array with DGS-based metamaterial for efficient smartphone communication and SAR reduction

Al Gburi, Ahmed Jamal Abdullah and Megahed, Amany A. and Hussein Abdullah, Amr Hussein and Elabd, Rania Hamdy (2025) Compact wideband antenna array with DGS-based metamaterial for efficient smartphone communication and SAR reduction. Progress in Electromagnetics Research B, 110. 15 - 28. ISSN 1937-6472

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Abstract

This study investigates a high-gain, miniaturized antenna array featuring semicircular Defected Ground Structures (DGSs) based metamaterial designed for wideband smartphone applications. The antenna array, measuring 49 × 25 mm2, is constructed on an FR4 substrate with a dielectric constant of 4.3 and a thickness of 1.6 mm. The design incorporates two orthogonal antennas, each with a U-shaped radiating patch and a semicircular DGS to control bandwidth and reduce size. A T-shaped stub is positioned at the center of the U-shaped radiating area, with a star-shaped element attached to the leg of the T-shaped stub to enable wideband operation. The antenna demonstrates strong S11 performance, achieving approximately −38 dB at 5.8 GHz and −42 dB at 8.1 GHz, making it ideal for Sub-6 GHz and C-band applications. The proposed antenna array operates across a frequency range from 4 GHz to beyond 10 GHz, reaching a peak gain of 11 dBi and an efficiency of 95%. A time-domain analysis was conducted to verify radiation efficiency, and the specific absorption rate (SAR) is approximately 0.0475 for 1 g of tissue and 0.0101 for 10 g of tissue at 4.5 GHz, confirming the array’s suitability for wideband smartphone devices within the target frequency band. The simulated and experimental results of the proposed antenna array show excellent agreement.

Item Type:	Article
Uncontrolled Keywords:	Antenna grounds, Layered semiconductors, Metamaterial antennas, Metamaterials, Microstrip antennas, Smartphones
Divisions:	Faculty Of Electronics And Computer Technology And Engineering
Depositing User:	Norfaradilla Idayu Ab. Ghafar
Date Deposited:	11 Dec 2025 02:53
Last Modified:	11 Dec 2025 02:53
URI:	http://eprints.utem.edu.my/id/eprint/29202
Statistic Details:	View Download Statistic

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