Open AccessBroadband trifunctional metasurface and its application in a lens antenna
Author(s) -
Ximing Li,
Jian Chen,
Xiang Xi,
Xin Li,
Qiang Cheng,
RuiXin Wu
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.431316
Subject(s) - broadband , optics , wavefront , wideband , polarization (electrochemistry) , antenna (radio) , beam steering , lens (geology) , reconfigurable antenna , metamaterial , scattering , optoelectronics , physics , materials science , beam (structure) , radiation pattern , telecommunications , computer science , antenna efficiency , chemistry
Multifunctional metasurfaces have attracted extensive attention due to their ability to achieve diversified wavefront controls in flat devices. To date, most designs through metasurface are confined to realize one or two functionalities. In this work, we implement a broadband trifunctional metasurface by using different meta-atoms of the same type. The meta-atoms can independently manipulate the amplitude and phase of transmitted waves and the phase of reflected waves in a wide frequency range. Thus, they help the metasurface achieving the functionalities of beam deflection, diffuse scattering, and beam focusing according to the polarization and the direction of incident waves. The metasurface is applied to a metalens antenna, which features broadband, low side-lobe, and stealth. The metalens antenna works at the frequency range 9.8 GHz to 11.6 GHz with gain over 25 dBi. Experiments verify the functions of the trifunctional metasurface and are in good agreement with the designs. Our approach provides a solid platform for high-efficiency wideband metadevices with diverse functionalities.