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.
Modal characterization of lossy metamaterial slab waveguides / H. A., Olanigan; A. B., Yakovlev; Lovat, Giampiero; Burghignoli, Paolo; G. W., Hanson. - ELETTRONICO. - (2007), pp. 1-5. (Intervento presentato al convegno 2nd European Conference on Antennas and Propagation 2007 tenutosi a Edimburgh (UK) nel 11-16 novembre 2007).
Modal characterization of lossy metamaterial slab waveguides
LOVAT, GIAMPIERO;BURGHIGNOLI, Paolo;
2007
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
