Compact wideband antenna array with DGS-based metamaterial for efficient smartphone communication and SAR reduction
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 an...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | en |
| Published: |
Electromagnetics Academy
2025
|
| Online Access: | http://eprints.utem.edu.my/id/eprint/29202/2/02702210420251136531758.pdf http://eprints.utem.edu.my/id/eprint/29202/ https://www.jpier.org/issues/reader.html?pid=24120504 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | 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. |
|---|