A Single-Layer Reflectarray Unit Cell with Enhanced Performance Using Dual Concentric Split-Circle Rings

作者

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https://doi.org/10.13052/2026.ACES.J.410205

关键词:

Bandwidth improvement, single-layer, split-circle rings, unit cell, wideband reflectarray

摘要

This paper proposes a dual-ring unit cell design for a single-layer reflectarray antenna. The element is attained using two concentric split-ring resonators, where each ring is divided into four equal sections. By adjusting the width, scaling, and radius of the concentric split-rings, two distinct resonance frequencies are realized in each ring, attributable to the electric length inside the rings. This approach yields a wider phase range for the reflection coefficient, with a nearly linear phase response. Three different configurations are investigated to identify the best performance parameters. The electromagnetic behavior of the proposed unit element is simulated using CST Microwave Studio Suite. The reflection characteristics are analyzed using the infinite-array model with Floquet port excitation. Hexahedral meshing is employed for the antenna configuration, with the mesh density adjusted according to the wavelength to validate sufficient resolution of the structural features. The unit cell was also investigated using the HFSS frequency-domain solver based on the finite integration technique. An equivalent circuit was found using the Advanced Design System (ADS). The simulation results indicate that all three configurations offer a broad phase variation, with the minimum phase of approximately 885∘ at 10 GHz in case 2, and a maximum phase slope of 68∘/mm at 12 GHz in case 1, over the 8–12 GHz frequency range. The configuration in case 3 achieves the widest operational bandwidth of 26.8% centered at 10 GHz.

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Likaa S. Yahya received the M.Sc. in Electrical Engineering and Ph.D. in Communication Engineering from the University of Mosul in 2002 and 2017, respectively. She is currently Assistant Professor in the Department of Electronic and Communication Engineering Techniques, Northern Technical University, Mosul, Iraq. She has published more than 10 papers in international journals and conferences. Her interests include antenna design and antenna modeling.

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Khalil H. Sayidmarie received the B.Sc. degree in Electronics and Communication Engineering from Mosul University, Iraq, in 1976, and the Ph.D. Degree in Antennas and Propagation from Sheffield University, UK, in 1981. He joined the College of Engineering at Mosul University in 1983 and was promoted to full professor in 1992. He worked as head of the electrical engineering department for nine years. Sayidmarie served as Professor of Communication Engineering at the College of Engineering, University of Amman, Jordan, from October 2006 to September 2009, and as Dean of that college from September 2008 to September 2009. He has been Professor of communication engineering at the College of Electronics Engineering, Ninevah University, since July 2002. He is currently Professor Emeritus with the College of Electronics Engineering, Ninevah University. His research interests include antennas, propagation, and microwaves, and he has published more than 160 papers in international journals and conferences.

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已出版

2026-02-20

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[1]
L. S. . Yahya 和 K. H. . Sayidmarie, 《A Single-Layer Reflectarray Unit Cell with Enhanced Performance Using Dual Concentric Split-Circle Rings》, ACES Journal, 卷 41, 期 02, 页 144–154, 2月 2026.

期

2026: Vol 41 Iss 2

栏目

Advances in Next-Generation Antenna Systems and Their Testing Methodologies

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