Multifunctional Metasurface with PIN Diode Application Featuring Absorption, Polarization Conversion, and Transmission Functions

The objective of this paper is to explore the potential of integrating three distinct functionalities into a thin, single-layer metasurface. Specifically, the study introduces a metasurface design that combines absorption, polarization conversion, and transmission capabilities. The proposed structur...

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Bibliographic Details
Published in:Micromachines (Basel) 2024-10, Vol.15 (11), p.1344
Main Authors: Nobre, Francisco D M, de Sousa, Thayana M L, Campos, Antônio L P S, da Silva, Maurício W B
Format: Article
Language:English
Subjects:
absorber
Absorption
Circuit components
Copper
Cost control
Design
Dielectrics
Diodes
Electric waves
Electromagnetic radiation
Electromagnetic waves
Electromagnetism
Frequency ranges
Ground plane
linear polarization converter
Manufacturing
metasurface
Metasurfaces
PIN diodes
Polarization
Resonators
Signal transmission
Software
Substrates
Symmetry
Thickness
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Summary:The objective of this paper is to explore the potential of integrating three distinct functionalities into a thin, single-layer metasurface. Specifically, the study introduces a metasurface design that combines absorption, polarization conversion, and transmission capabilities. The proposed structure consists of a double square loop disposed on a dielectric substrate, which is covered by a superstrate. In this study, the traditional ground plane was replaced with a periodic array, selectively reflecting frequencies of interest. Then, the absorption and polarization conversion characteristics were achieved by introducing the resonators in the front layer. By introducing asymmetry to the resonators and integrating PIN diodes for control, we demonstrated that the metasurface could efficiently absorb electromagnetic waves (with PIN diodes in the ON state), convert polarization (with PIN diodes in the OFF state), and enable signal transmission in a different frequency range. The numerical results indicated excellent performance in both absorption and polarization conversion. At a frequency of 3.05 GHz, the absorption rate reached 97%, while a polarization conversion rate of 98% was achieved at the resonance frequency of 4.37 GHz. Moreover, the proposed structure exhibited a thickness of λ/30.7 at the absorption peak.
ISSN:2072-666X
2072-666X
DOI:10.3390/mi15111344