An X-shaped metasurface for high-efficiency ultra-wideband linear-to-circular and circular-to-linear polarization conversions. Issue 5 (24th March 2023)

• Record Type: Journal Article
• Authors: Lin, Baoqin; Huang, Wenzhun; Guo, Jianxin; Wang, Yanwen; Ye, Hongjun; Ji, Xiang
• Is Part Of: Journal of electromagnetic waves and applications. Volume 37:Issue 5(2023)
• Page Start: 661
• Page End: 671
• Publication Date: 2023-03-24
• Subjects: Metasurface -- polarization conversion -- polarization conversion rate; Electromagnetic waves -- Periodicals; Electromagnetic devices -- Periodicals; 621.3
• DOI: 10.1080/09205071.2022.2164223
• Languages: English
• ISSNs: 0920-5071

Abstract

Abstract : In this study, an X-shaped metasurface composed of an array of X-shaped metal patches printed on a grounded dielectric substrate and covered by a top dielectric layer is proposed for both linear-to-circular (LTC) and circular-to-linear (CTL) polarization conversions. Theoretical analysis and numerical simulations indicate that the metasurface can be used as both LTC and CTL reflective polarization converters. Under u- and v-polarized incidences, it can achieve LTC polarization conversion in the ultra-wide frequency band from 7.5 to 25.8 GHz with a relative bandwidth of 110%, and the polarization conversion rate (PCR) can be kept larger than 99.7% in the frequency range of 7.9-24.7 GHz. Moreover, under CP incidence, a high-efficiency ultra-wideband CTL polarization conversion can be achieved, the bandwidth and PCR are almost the same as those of the LTC polarization conversion. Finally, one experimental verification is carried out, and a reasonable agreement is observed between the simulation and experimental results.