Compact Multi-Ring Reflectarray Antenna at Wi-Fi for Overcoming Signal Blockage in Dense Urban Areas.

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Bibliographic Details
Title:	Compact Multi-Ring Reflectarray Antenna at Wi-Fi for Overcoming Signal Blockage in Dense Urban Areas.
Authors:	Manikya Kumar, Make Madhu^1,2 madhu.make2@gmail.com, Kolisetty, Rama Devi¹
Source:	Progress in Electromagnetics Research C. 2026, Vol. 165, p239-246. 8p.
Subjects:	Reflectarray antennas, Beam steering, Wireless Internet, Wireless communications, Interference (Telecommunication), Cities & towns, Radio frequency, Unit cell
Abstract:	The demand for reliable and high-speed wireless communication in urban environments such as offices and densely populated areas is often hindered by signal obstructions. Reflectarray antennas offering beam-steering capabilities through passive configurations have gained significant attention as a potential solution. However, existing designs at lower frequency bands struggle to achieve efficient phase variation within a single layer while maintaining high gain and consistent performance. In order to overcome these constraints, this work presents a reflectarray design that operates at 5 GHz. It utilizes a 15 x 15 multi-ring unit cell structure on a single-layer FR4 substrate to achieve a complete 360o phase variation. Two prototypes were fabricated to steer beams at 30o and 60o, demonstrating the design's flexibility and adaptability for various application-specific requirements. The proposed reflectarray realizes a peak gain of 21 dBi and operates over a wide frequency range of 4.5-5.5 GHz, as validated through simulated and experimental results. The design effectively enhances signal coverage and addresses blockage challenges in urban areas, providing a practical solution for passive reflectarrays in Wi-Fi and similar wireless communication applications. [ABSTRACT FROM AUTHOR]
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Database:	Engineering Source

Description
Abstract:	The demand for reliable and high-speed wireless communication in urban environments such as offices and densely populated areas is often hindered by signal obstructions. Reflectarray antennas offering beam-steering capabilities through passive configurations have gained significant attention as a potential solution. However, existing designs at lower frequency bands struggle to achieve efficient phase variation within a single layer while maintaining high gain and consistent performance. In order to overcome these constraints, this work presents a reflectarray design that operates at 5 GHz. It utilizes a 15 x 15 multi-ring unit cell structure on a single-layer FR4 substrate to achieve a complete 360o phase variation. Two prototypes were fabricated to steer beams at 30o and 60o, demonstrating the design's flexibility and adaptability for various application-specific requirements. The proposed reflectarray realizes a peak gain of 21 dBi and operates over a wide frequency range of 4.5-5.5 GHz, as validated through simulated and experimental results. The design effectively enhances signal coverage and addresses blockage challenges in urban areas, providing a practical solution for passive reflectarrays in Wi-Fi and similar wireless communication applications. [ABSTRACT FROM AUTHOR]
ISSN:	19378718
DOI:	10.2528/PIERC25061102