Wideband circularly polarized array antenna based on sequential phase feeding metasurfaces for 5G (sub-6G) applications. Issue 1 (2nd January 2023)

• Record Type: Journal Article
• Authors: Wang, Shuqi; Hao, Han; Ma, Xia; Cheng, Houyuan; Huang, Xiaojun
• Is Part Of: Journal of electromagnetic waves and applications. Volume 37:Issue 1(2023)
• Page Start: 15
• Page End: 24
• Publication Date: 2023-01-02
• Subjects: Sequential phase -- metasurface -- circular polarization; Electromagnetic waves -- Periodicals; Electromagnetic devices -- Periodicals; 621.3
• DOI: 10.1080/09205071.2022.2110948
• Languages: English
• ISSNs: 0920-5071

Abstract

Abstract : In this paper, a broadband circularly polarized array antenna is presented, which consists of four loop slot antennas based on metasurfaces. The antenna element is a loop slot antenna fed by a microstrip line. Cross slots are added to the loop slot to improve the antenna bandwidth, and four corner-cut square metasurfaces are loaded above it, thus generating circularly polarized radiation. The antenna adopts a sequential phase (SP) feed network to realize broadband characteristics. The antenna has been fabricated and experimented. The overall size of the antenna is 78 × 78 × 10.1 mm 3 (approximately 1.22 λ0 × 1.22 λ0 × 0.15 λ0 ), the antenna array has a measured |S11 | < −10 dB bandwidth of 3.6–6.2 GHz (53.1%) and a 3-dB axial ratio bandwidth of 3.7–4.8 GHz (28.32%). Furthermore, the antenna also has radiation with a peak gain of 5.5 dBi.