Achieving PMC boundary conditions through metamaterials
ISSN: 0332-1649
Article publication date: 11 November 2013
Abstract
Purpose
The purpose of this paper is to show how metamaterials with extreme values of permittivity and permeability, may be effectively used to design artificial magnetic conductors (AMC) at a given frequency. In particular, this paper theoretically determines, for the different polarizations of the incidence field, the conditions under which metamaterials can behave as an AMC.
Design/methodology/approach
In order to find out the required values of the constitutive parameters, this paper has done a theoretical analysis based on the transmission-line theory. The obtained analytical reflection coefficient has been particularized for the different possible polarizations of the incidence field in order to find the constitutive parameters values that this paper needs for the AMC behavior.
Findings
Depending on the polarization of the field, it is shown that different values of the constitutive parameters are needed to get AMCs. In particular, it is shown that in the case of TEM and TE polarizations, a large value of the permeability is enough to obtain an AMC boundary condition. In the case of the TM polarization, instead, the AMC boundary condition is effectively achieved by using a material with vanishing permittivity. The role of the permittivity in the three polarizations is discussed. Finally, possible implementations and applications at microwave and optical frequencies are presented.
Originality/value
The idea of using miniaturized inclusions to obtain AMCs is not completely new. However, to the authors' best knowledge, a complete and rigorous theoretical analysis showing the capabilities and the limits of this approach has not yet been presented in the open technical literature.
Keywords
Citation
Monti, A., Scorrano, L., Tricarico, S., Bilotti, F., Toscano, A. and Vegni, L. (2013), "Achieving PMC boundary conditions through metamaterials", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 32 No. 6, pp. 1876-1890. https://doi.org/10.1108/COMPEL-10-2012-0281
Publisher
:Emerald Group Publishing Limited
Copyright © 2013, Emerald Group Publishing Limited