High-Efficiency Refracting Millimeter-Wave Metasurfaces

Printed circuit metasurfaces have attracted significant attention in the microwave community for their versatile wavefront manipulation capability. Despite their promising potential in telecommunications and radar applications, few transmissive metasurfaces have been reported operating at millimeter...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2020-07, Vol.68 (7), p.5453-5462
Main Authors: Olk, Andreas E., Macchi, Pierre E. M., Powell, David A.
Format: Article
Language:English
Subjects:
Beam refraction
Circuits
Computer architecture
Conductors
Copper
Coupling
Couplings
Floquet harmonics
Frequency ranges
Harmonic analysis
Huygens metasurface
Interlayers
metamaterial
Metasurfaces
millimeter wave
Millimeter waves
Numerical models
Performance degradation
Printed circuits
Roughness
Synthesis
Tolerances
Wave fronts
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Summary:Printed circuit metasurfaces have attracted significant attention in the microwave community for their versatile wavefront manipulation capability. Despite their promising potential in telecommunications and radar applications, few transmissive metasurfaces have been reported operating at millimeter-wave frequencies. Several secondary effects including fabrication tolerances, interlayer near-field coupling, and the roughness of conductors are more severe at such high frequencies and can cause significant performance degradation. Additionally, very accurate experimental techniques are required in order to characterize these effects. In this article, we present highly efficient refracting metasurfaces operating at 83GHz. We use a synthesis technique that minimizes performance degradation due to effects such as interlayer near-field coupling and conductor roughness. Our experimental characterization includes an accurate determination of the intensity of all forward propagating Floquet harmonics in a broad frequency range. The experimental data show very good agreement with full-wave simulation and verify our synthesis method.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2020.2975840