Dielectric metamaterials are an attractive alternative to metallic metamaterials in order to reduce losses. Mie resonances
in dielectric resonators can give rise to a resonant effective permeability or permittivity at resonance frequencies. When
resonances are sufficiently enhanced permeability or permittivity can become negative. In the microwave range 2D rodshaped
or 3D cylinder-shaped resonators made of high-permittivity ferroelectric material can be used to demonstrate
such phenomena. In the first part we present experimental proof for TE-modes in rod resonators in the X-band (8.20-
12.40GHz) using barium strontium titanate (Ba0.4Sr0.6TiO3, ε=575). In the second part we present experimental proof for
modes in cylinder resonators in both the X and S-band (2.60-3.95GHz) using a commercial ceramic (ε=78). A negative
index of refraction is shown in both cases.
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