Improving antenna near-field pattern by use of artificial impedance screens

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An antenna prototype utilizing artificial impedance surfaces to control the near field distribution is described. The antenna is a folded dipole placed above a finite-size artificial impedance surface. We have found that the field screening is most effective if the surface is a metal conductor. However, to achieve a reasonable value of the radiation resistance the dipole should be located far off the screen. If the surface is a magnetic wall, the antenna design is more compact, but the field behind the screen is large. Here we realize a compromise solution using an inductive surface of a moderate surface impedance, which allows realization of an effective near-field screen with still a reasonably low-profile design.
10 pages, 12 figures, 3 tables

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Classical Physics, General Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/87041

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/physics/0504123
 http://arxiv.org/abs/physics/0504123

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arXiv