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Title: Electromagnetic characterization of textured surfaces formed by metallic pins
Authors: Silveirinha, Mário G.
Fernandes, Carlos A.
Costa, Jorge R.
Keywords: Additional boundary conditions (ABC)
High impedance surfaces
Surface impedance
Wire media
Issue Date: Feb-2008
Publisher: IEEE
Abstract: We develop a homogenization model to characterize textured surfaces formed by a periodic arrangement of thin metallic pins attached to a conducting ground plane: the ldquoFakir's bed of nailsrdquo substrate. It is demonstrated that the textured surface can be accurately modeled using a dielectric function, provided spatial dispersion effects are considered as well as additional boundary conditions. We derive closed analytical formulas for the reflection coefficient, and for the dispersion characteristic of the surfaces waves. In addition, it is demonstrated that the artificial substrate may mimic almost exactly the behavior of an ideal impedance surface boundary, and that the only physical factor that may limit this remarkable property is the skin depth of the metal. The reported results are supported by full wave simulations as well as by experimental data.
Description: WOS:000253086900014 (Nº de Acesso Web of Science)
Peer reviewed: Sim
ISSN: 0018-926X
Publisher version: The definitive version is available at:
Appears in Collections:CTI-RI - Artigos em revistas científicas internacionais com arbitragem científica
IT-RI - Artigo em revista internacional com arbitragem científica

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