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Omega-Type Balanced Composite Negative Refractive Index Materials

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6 Author(s)
Lheurette, E. ; Inst. d''Electron. de Microelectron. et Nanotechnol., Univ. des Sci. et Technol. de Lille, Villeneuve d''Ascq ; Houzet, G. ; Carbonell, J. ; Zhang, Fuli
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We report on the theoretical and experimental analysis of Omega-type metamaterials operating in X and Ku-bands. The prototypes are fabricated on the basis of metal waveguide technologies (hollow and TEM parallel plate) loaded with printed boards of interconnected Omega-shaped motifs. This interconnection of particles in the transverse direction leads to a broad left-handed band. Moreover, it is shown that such structures can be designed for a continuous negative-zero-positive index dispersion. This balanced composite behavior, so far known for periodically loaded transmission lines is verified experimentally with left- and right-handed dispersion branches extending from 8 to 12 and 12 to 16 GHz respectively. This zero-gap capability is explained on the basis of effective parameters retrieval.

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Antennas and Propagation, IEEE Transactions on  (Volume:56 ,  Issue: 11 )