Negative electrical permittivity in metamaterials for a wire of rectangular cross-sectional: an application to antennas design

Abstract

In this article, we propose a model to obtain negative electrical permittivity in metamaterials using a conductor wire of rectangular cross-sectional geometry. Plasma frequency in the GHz range is determined in terms of the wire geometry. This new composite dielectric, which has the property of negative electrical permittivity below the plasma frequency, opens new possibilities for GHz devices. Finally, we show a unitary metamaterial cell where the refractive index takes negative values over a wide frequency range.

KEYWORDS:

• Electrical permittivity
• plasma frequency
• metamaterials

Acknowledgements

Héctor Lorduy acknowledge the financial support of the Universidad Pontificia Bolivariana, Medellín-Colombia, its Centro de Ciencia Básica and the Centro de Investigación para el Desarrollo y la Innovación, CIDI, in marked within the project 545C-12/19-27.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Notes on contributors

Héctor Lorduy G

Héctor Lorduy G received the degree in physics from the Universidad de Antioquia, Medellín, Colombia, in 1993. In 2007, he received the master’s degree in physical sciences from the Universidad Nacional de Colombia, Medellín Colombia, and in 2012, received a Ph.D. in Engineering from Universidad Pontificia Bolivariana, Medellín, Colombia. His current interest in research is the study of metamaterials and their possible applications.

L. M. Castellanos

L. M. Castellanos received the degree in physics from the Universidad de Antioquia, Medellín, Colombia, in 1973. In 1980, he received the master’s degree in physical sciences from the Hunter College of the City University of New York (CUNY), USA. His current interest in research is the study of metamaterials and their possible applications.