Modal Characterization of Lossy Metamaterial Slab Waveguides

Author

Olanigan, H.A. ; Yakovlev, A.B. ; Lovat, G. ; Burghignoli, P. ; Hanson, George W.

Author_Institution

Dept. of Electr. Eng., Univ. of Mississippi, Oxford, MS, USA

fYear

2007

fDate

11-16 Nov. 2007

Firstpage

1

Lastpage

5

Abstract

The dispersion behaviour of metamaterial structures that support backward waves is studied by analyzing the modal spectrum of homogenized dispersive double-negative slab waveguides with magnetic losses. The evolution of complex wavenumbers by varying frequency is investigated for TE modes in the frequency range where the metamaterial changes from epsilon negative to double negative, identifying mode- interaction regimes that are interpreted in terms of migration of branch-point singularities in the complex frequency plane parameterized by the value of magnetic loss.

Keywords

absorbing media; metamaterials; microwave propagation; waveguides; TE mode; backward wave; branch point singularity; complex frequency plane; complex wavenumber; dispersion behaviour; homogenized dispersive double negative slab waveguide; lossy metamaterial slab waveguide modal characterization; magnetic loss; modal spectrum; mode interaction; Slab waveguides; leaky waves; metamaterials; surface waves;

fLanguage

English

Publisher

iet

Conference_Titel

Antennas and Propagation, 2007. EuCAP 2007. The Second European Conference on

Conference_Location

Edinburgh

Print_ISBN

978-0-86341-842-6

Type

conf

Filename

4458779