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Microwave-Frequency, Negative-Index Metamaterial Designs Based on Degenerate Dielectric Resonators

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5 Author(s)
Basilio, L.I. ; Electromagn. Theor. Dept., Sandia Nat. Labs., Albuquerque, NM, USA ; Warne, L.K. ; Langston, W.L. ; Johnson, W.A.
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In this letter, three different negative-index metamaterial designs based on single-particle degenerate dielectric resonators are presented. The resonator designs are realized by introducing high-contrast perturbations to the cavity geometry so as to bring the lowest-order electric and magnetic cavity resonances into frequency alignment. Since negative-index behavior can be demonstrated with only a single-type resonator (as opposed to dual-particle), these types of degenerate dielectric resonators potentially offer a size advantage so that the structure is less apt to fall outside the effective-medium region.

Published in:

Antennas and Wireless Propagation Letters, IEEE  (Volume:11 )