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- Title
A Novel Single-Layer Anisotropic Unit for Transmit-Reflect Double Function Array.
- Authors
Huifen Huang; Shuai-Nan Li
- Abstract
In this paper, a novel single-layer anisotropic unit with both reflection and transmission functions is proposed. The unit is a ring-encircled two mirror-symmetry fan-shaped patches, and is fabricated in one side of an F4B substrate. The unit structure is asymmetry with respect to x- and y-axes, and both transmitted and reflected cross-polarized fields are generated simultaneously when the co-polarized field is incident on the symmetry broken surface. Full 360◦ phase shift range is achieved by utilizing the cross-polarized field, and the transmitted and reflected coefficient magnitudes are above 0.49 close to the theoretical limit. Using this anisotropic unit, three single-layer transmit-reflect-arrays are designed: (1) Two high-gain beams in (θ1 = 0◦, ϕ1 = 0◦) and (θ1 = 180◦, ϕ1 = 0◦) directions. The gain is 20.9 dBi, and the 3 dB beam width is 8.9◦. (2) Two OAM beams with l = 1 at (θ1 = 45◦, ϕ1 = 0◦) and (θ2 = 135◦, ϕ2 = 0◦). (3) Four OAM beams with l = 1 at (θ1 = 30◦, ϕ1 = 0◦), (θ2 = -30◦, ϕ2 = 180◦), (θ3 = 150◦, ϕ3 = 0◦) and (θ4 = -150◦, ϕ4 = 180◦). The simulated and measured results agree well and validate the design principle. The proposed metasurface has the following advantages: single-layer, transmission and reflection dual-functions, multi-beam, and high gain.
- Subjects
SYMMETRY breaking; REFLECTIONS
- Publication
Progress in Electromagnetics Research M, 2020, Vol 95, p155
- ISSN
1937-8726
- Publication type
Article
- DOI
10.2528/pierm20071105