Demonstration of Scattering Suppression by a Near-Zero-Index Metamaterial Composed of Dielectric Spheres

Demonstration of Scattering Suppression by a Near-Zero-Index Metamaterial Composed of Dielectric Spheres

We demonstrate microwave scattering suppression by a near-zero-index metamaterial (NZIM) composed of dielectric spheres. The NZIM is designed based on numerical simulations, and is shown by near-field measurements that the medium with dielectric spheres of yttria-stabilized zirconia with the dielect...

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Veröffentlicht in:IEEE transactions on microwave theory and techniques 2018-09, Vol.66 (9), p.3921-3926
Hauptverfasser: Takano, Yuma, Sanada, Atsushi
Format: Artikel
Sprache:eng
Schlagworte:
Computer simulation
Dielectric spheres
Dielectrics
Hexagonal lattice
invisibility cloaks
Lattice parameters
Lattices
Metamaterials
Microwave scattering
Microwave theory and techniques
Mie resonance
near-zero-index metamaterials (NZIMs)
Permeability
Permittivity
Resonant frequency
Scattering
scattering suppression
Yttria-stabilized zirconia
Yttrium oxide
Zirconium dioxide
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Zusammenfassung:We demonstrate microwave scattering suppression by a near-zero-index metamaterial (NZIM) composed of dielectric spheres. The NZIM is designed based on numerical simulations, and is shown by near-field measurements that the medium with dielectric spheres of yttria-stabilized zirconia with the dielectric constant 34 and the radius 1.5 mm arranged in a hexagonal lattice of the lattice constant 3.5 mm exhibits near-zero-index operations with a long wavelength of 22.51 GHz. It is also confirmed that the scattering by a defect of seven adjacent absent spheres is sufficiently suppressed by the NZIM.
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2018.2858822