Open AccessExperimental realization of ultra-compact high-efficiency metasurface Luneburg lenses for microwave applications
Author(s) -
Weiren Zhu,
Jianping Li
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1461/1/012200
Subject(s) - luneburg lens , optics , lens (geology) , broadband , microwave , materials science , refractive index , optoelectronics , physics , quantum mechanics
Metasurfaces have shown the prospect of manipulating electromagnetic beams of various forms within a deeply subwavelength scale, which is especially useful in novel antennas designs and compact microwave devices or systems. In this paper, we present an ultra-compact, high-efficiency, and broadband metasurface Luneburg lens for full-angle operation at microwave frequencies. The design of the Luneburg lens is based on a holly parallel-plate-waveguide, where nonuniform circular holes are etched on the upper metallic plate. The gradient profile of the effective refractive index is achieved by varying the hole diameter. The high efficiency and broadband features of the proposed metasurface Luneburg lens are demonstrated numerically and experimentally. Owing to the symmetry of the Luneburg lens, such a lens is well suited for full-angle operation.