Title :
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
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;
Conference_Titel :
Antennas and Propagation, 2007. EuCAP 2007. The Second European Conference on
Conference_Location :
Edinburgh
Print_ISBN :
978-0-86341-842-6
