W-band single-layer broadband reflectarray antenna

• Published in: IEEE access Vol. 11; p. 1
• Main Authors: Wang, Zhicheng, Zhang, Rui, Song, Wenke, Lin, Xiaobo, Xie, Bingchuan, Wang, Jing, Zhao, Ruifeng
• Format: Journal Article
• Language: English
• Published: Piscataway IEEE 01-01-2023; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Antenna arrays; Antennas; Apertures; Broadband; Broadband antennas; Broadband communication; Diameters; Electromagnetic scattering; low-profile; Radar antennas; reflectarray; Reflection; Reflector antennas; Substrates; W-band; Wireless communications
• ISSN: 2169-3536; 2169-3536
• DOI: 10.1109/ACCESS.2023.3290098

In this paper, a W-band single-layer reflectarray antenna is proposed with the advantages of broadband and high aperture efficiency. A novel dual rotation-symmetry windmill element is designed in the W-band, which consists two layers of copper patches printed on a Rogers RT5880 substrate. Based on the analysis of the proposed metasurface element, a square reflectarray with 13.85λ 0 (44.2 mm) aperture diameter at 94 GHz center frequency was designed, fabricated and measured. The designed reflectarray antenna shows a 1-dB gain bandwidth of 25.5% (89-113 GHz) in the W-band. Moreover, the measured gain is 31.1 dBi at 94 GHz and the maximum aperture efficiency is 53.4%. The result shows that the proposed design has prospects in wireless communication applications.