期刊
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
卷 142, 期 -, 页码 -出版社
ELSEVIER GMBH
DOI: 10.1016/j.aeue.2021.154009
关键词
Asymmetric transmission; Bi-anisotropy; Chiral; Multi-band; Planar; Polarization conversion; Ultrathin
This paper proposes a planar chiral metasurface with two layers of omega-shaped unit cells for linear-to-circular polarization conversion and cross-polarized transmission of linearly polarized incident waves. The structure exhibits good response for different frequency bands and incident angles, making it suitable for applications in various microwave bands.
This paper presents a planar chiral metasurface with two layers of omega-shaped unit cells placed on opposite sides of a substrate. The metasurface achieves linear-to-circular polarization conversion within a single band and cross-polarized transmission of linearly polarized incident waves in five bands. Due to the asymmetry and anisotropy of the metasurface in its plane, the linear-to-circular and cross-polarization conversion transmission bands are asymmetric in nature. The structure also exhibits a symmetric co-polarized transmission band for both x- and y-directed incident E-field orientations. The proposed structure gives good response for incident angles up to 60(0) from 3 GHz to 11.5 GHz and up to 30(0) from 11.5 GHz to 13.5 GHz for both transverse-electric and transverse-magnetic incidence. It is also ultrathin and has a thickness of lambda(0)/64.7, where lambda(0) is the free space wavelength at the lowest frequency of operation. The proposed MS can be used for S, C, X as well as Ku microwave band applications.
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