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

Mervi Hirvonen (Corresponding Author), Johan Sten

Research output: Contribution to journalArticleScientificpeer-review

5 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 languageEnglish
Pages (from-to)684 - 690
Number of pages7
JournalIEEE Transactions on Antennas and Propagation
Volume56
Issue number3
DOIs
Publication statusPublished - 2008
MoE publication typeA1 Journal article-refereed

Fingerprint

Metamaterials
Antennas
Radiation
Coatings
Wave power
Antenna grounds
Surface waves
Permittivity
Finite element method
Air

Keywords

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

Cite this

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Power and Q of a horizontal dipole over a metamaterial coated conducting surface. / Hirvonen, Mervi (Corresponding Author); Sten, Johan.

In: IEEE Transactions on Antennas and Propagation, Vol. 56, No. 3, 2008, p. 684 - 690.

Research output: Contribution to journalArticleScientificpeer-review

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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

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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

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EP - 690

JO - IEEE Transactions on Antennas and Propagation

JF - IEEE Transactions on Antennas and Propagation

SN - 0018-926X

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