Power and Q of a horizontal dipole over a metamaterial coated conducting surface

Mervi Hirvonen; Johan Sten

doi:10.1109/TAP.2008.916937

Power and Q of a horizontal dipole over a metamaterial coated conducting surface

Mervi Hirvonen (Corresponding Author), Johan Sten

Research output: Contribution to journal › Article › Scientific › peer-review

7 Citations (Scopus)

Abstract

The radiation properties of an electrically small antenna attached to an infinite conducting ground plane covered by a thin sheet of a metamaterial medium are considered. Using analytical field expressions, the radiation of an electric point dipole with arbitrary constitutive parameters of the material coating is studied. Attention is paid especially to permittivity values close to zero. Finite element simulations are employed to confirm the radiation enhancement and low quality factor Q characteristic of a zero-index coating as compared with regular ";air-filling."; The Q is evaluated partly through integration of the energy of the FEM-simulated fields within the antenna region and partly from the nonradiating component of the multipole fields outside the antenna region. Additionally, the influence of surface wave power is analyzed through simulations.

Original language	English
Pages (from-to)	684 - 690
Number of pages	7
Journal	IEEE Transactions on Antennas and Propagation
Volume	56
Issue number	3
DOIs	https://doi.org/10.1109/TAP.2008.916937
Publication status	Published - 2008
MoE publication type	A1 Journal article-refereed

Keywords

Conducting surface
Dipole antenna
Q factor
Radiated power
Zero-index materials

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10.1109/TAP.2008.916937

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abstract = "The radiation properties of an electrically small antenna attached to an infinite conducting ground plane covered by a thin sheet of a metamaterial medium are considered. Using analytical field expressions, the radiation of an electric point dipole with arbitrary constitutive parameters of the material coating is studied. Attention is paid especially to permittivity values close to zero. Finite element simulations are employed to confirm the radiation enhancement and low quality factor Q characteristic of a zero-index coating as compared with regular {"};air-filling.{"}; The Q is evaluated partly through integration of the energy of the FEM-simulated fields within the antenna region and partly from the nonradiating component of the multipole fields outside the antenna region. Additionally, the influence of surface wave power is analyzed through simulations.",

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T1 - Power and Q of a horizontal dipole over a metamaterial coated conducting surface

AU - Hirvonen, Mervi

AU - Sten, Johan

PY - 2008

Y1 - 2008

N2 - The radiation properties of an electrically small antenna attached to an infinite conducting ground plane covered by a thin sheet of a metamaterial medium are considered. Using analytical field expressions, the radiation of an electric point dipole with arbitrary constitutive parameters of the material coating is studied. Attention is paid especially to permittivity values close to zero. Finite element simulations are employed to confirm the radiation enhancement and low quality factor Q characteristic of a zero-index coating as compared with regular ";air-filling."; The Q is evaluated partly through integration of the energy of the FEM-simulated fields within the antenna region and partly from the nonradiating component of the multipole fields outside the antenna region. Additionally, the influence of surface wave power is analyzed through simulations.

AB - The radiation properties of an electrically small antenna attached to an infinite conducting ground plane covered by a thin sheet of a metamaterial medium are considered. Using analytical field expressions, the radiation of an electric point dipole with arbitrary constitutive parameters of the material coating is studied. Attention is paid especially to permittivity values close to zero. Finite element simulations are employed to confirm the radiation enhancement and low quality factor Q characteristic of a zero-index coating as compared with regular ";air-filling."; The Q is evaluated partly through integration of the energy of the FEM-simulated fields within the antenna region and partly from the nonradiating component of the multipole fields outside the antenna region. Additionally, the influence of surface wave power is analyzed through simulations.

KW - Conducting surface

KW - Dipole antenna

KW - Q factor

KW - Radiated power

KW - Zero-index materials

U2 - 10.1109/TAP.2008.916937

DO - 10.1109/TAP.2008.916937

M3 - Article

SN - 0018-926X

VL - 56

SP - 684

EP - 690

JO - IEEE Transactions on Antennas and Propagation

JF - IEEE Transactions on Antennas and Propagation

IS - 3

ER -

Power and Q of a horizontal dipole over a metamaterial coated conducting surface

Abstract

Keywords

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