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<p>The growing demand for high-speed and efficient wireless communication in urban environments such as office complexes and densely populated regions is often obstructed by signal propagation challenges. The use of a reflectarray antenna in place of traditional phased array designs for beam steering provides an advantage through a lower profile design; however, achieving 360◦ phase control at lower microwave frequencies, particularly across a wide operating range such as 4 – 6&#xa0;GHz. This paper discusses a single-layer broadband reflectarray capable of operating effectively over the 4 – 6&#xa0;GHz band. The proposed antenna consists of an 11 × 11 spiral ring unit array arranged on an FR4 epoxy substrate, providing a 360◦ phase-tuning capability. The effectiveness of the design was evaluated through the fabrication of two prototype antennas configured to achieve beam steering at angles of 30◦ and 60◦, thereby demonstrating the versatility of the proposed design for a variety of applications. An antipodal Vivaldi (AV) antenna was employed as the feed for the proposed reflectarray. The reflectarray achieved gains ranging from 7 – 14 dBi and operates over a wide frequency band of approximately 4 – 6&#xa0;GHz, with results validated through both simulations and experimental measurements. The proposed configuration offers a viable, cost-effective, and space-efficient solution for integrating broadband wireless communication systems in densely populated urban environments.</p>

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Broadband Reflectarray Antenna with Planar Feed for Improved Coverage in Dense Urban Areas

  • 期刊论文

  • 发表日期：

    2026年2月2日

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  • M. Madhu Manikya Kumar,
  • K. Rama Devi

摘要

The growing demand for high-speed and efficient wireless communication in urban environments such as office complexes and densely populated regions is often obstructed by signal propagation challenges. The use of a reflectarray antenna in place of traditional phased array designs for beam steering provides an advantage through a lower profile design; however, achieving 360◦ phase control at lower microwave frequencies, particularly across a wide operating range such as 4 – 6 GHz. This paper discusses a single-layer broadband reflectarray capable of operating effectively over the 4 – 6 GHz band. The proposed antenna consists of an 11 × 11 spiral ring unit array arranged on an FR4 epoxy substrate, providing a 360◦ phase-tuning capability. The effectiveness of the design was evaluated through the fabrication of two prototype antennas configured to achieve beam steering at angles of 30◦ and 60◦, thereby demonstrating the versatility of the proposed design for a variety of applications. An antipodal Vivaldi (AV) antenna was employed as the feed for the proposed reflectarray. The reflectarray achieved gains ranging from 7 – 14 dBi and operates over a wide frequency band of approximately 4 – 6 GHz, with results validated through both simulations and experimental measurements. The proposed configuration offers a viable, cost-effective, and space-efficient solution for integrating broadband wireless communication systems in densely populated urban environments.