Surface-wave suppression in a double-negative metamaterial grounded slab

Author

Baccarelli, P. ; Burghignoli, P. ; Lovat, G. ; Paulotto, S.

Author_Institution

Dept. of Electron. Eng., La Sapienza Univ. of Rome, Italy

Volume

2

Issue

1

fYear

2003

fDate

6/25/1905 12:00:00 AM

Firstpage

269

Lastpage

272

Abstract

Surface-wave propagation in a metamaterial grounded slab is investigated. In particular, a double-negative (DNG) medium is considered. On the basis of the dispersion equations for TE and TM surface waves supported by such a grounded slab, conditions are presented which ensure the suppression of a guided-wave regime for both polarizations. In contrast with ordinary grounded slabs, two kinds of surface waves (one evanescent only in air, the other evanescent both in air and inside the slab) have to be taken into account. The possible absence of any surface wave makes the considered structure a promising candidate as a substrate for microstrip antennas with reduced edge-diffraction effects and enhanced radiation efficiency.

Keywords

dielectric bodies; electromagnetic wave propagation; microstrip antennas; surface electromagnetic waves; dispersion equations; double-negative metamaterial grounded slab; edge-diffraction effects; electromagnetic-wave propagation; microstrip antennas; negative permeability; negative permittivity; radiation efficiency; surface-wave propagation; surface-wave suppression; Antennas and propagation; Electromagnetic propagation; Equations; Magnetic materials; Metamaterials; Microstrip antennas; Polarization; Slabs; Surface waves; Tellurium;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2003.819679

Filename

1260603