Improving antenna near-field pattern by use of artificial impedance screens
Abstract
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.
Keywords
Cite
@article{arxiv.physics/0504123,
title = {Improving antenna near-field pattern by use of artificial impedance screens},
author = {Stanislav Maslovski and Pekka Ikonen and Constantin Simovski and Mikko Karkkainen and Sergei Tretyakov and Vasil Denchev},
journal= {arXiv preprint arXiv:physics/0504123},
year = {2007}
}
Comments
10 pages, 12 figures, 3 tables