A TRIPLE WIRE MEDIUM AS AN ISOTROPIC NEGATIVE PERMITTIVITY METAMATERIAL

This paper presents an effective medium approach to calculate the attenuation and phase constants of modes in a 3D connected wire medium both below and above the plasma frequency. Physical and nonphysical modes in the structure are identified for all the important lattice directions. According to th...

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Veröffentlicht in:Electromagnetic waves (Cambridge, Mass.) Mass.), 2006, Vol.65, p.233-246
Hauptverfasser: Hudlicka, Martin, Machac, Jan, Nefedov, Igor S.
Format: Artikel
Sprache:eng
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Zusammenfassung:This paper presents an effective medium approach to calculate the attenuation and phase constants of modes in a 3D connected wire medium both below and above the plasma frequency. Physical and nonphysical modes in the structure are identified for all the important lattice directions. According to this, the medium behaves as an isotropic material in the vicinity of the plasma frequency. These results were compared with the numerical simulation and it was observed that the wave spreads below the plasma frequency along all the important lattice directions with the same attenuation constant. This implies isotropic behavior of the 3D wire lattice below the plasma frequency, and thus this medium can be considered as an isotropic negative permittivity medium.
ISSN:1559-8985
1070-4698
1559-8985
DOI:10.2528/PIER06102703