  We have made measurements of microwave transmission over the 12 - 18 GHz
range and through a simple metamaterial exhibiting a negative index of
refraction. The metamaterial consisted of an array of wires cladded in
dielectric embedded in a magnetic ferrite. The ferrite replaced the cut-ring
structure usually used to create the negative permeability. The dielectric
cladding decoupled the ferrite from the wires, thereby allowing the wire array
permittivity to be simultaneously negative with the permeability. The
simplicity of the design allows for miniaturization of potential microwave
devices based on this metamaterial.
