Journal
JOURNAL OF APPLIED PHYSICS
Volume 92, Issue 10, Pages 5930-5935Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1513194
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A composite medium consisting of an array of fine wires and split-ring resonators has been previously used to experimentally verify a negative index of refraction. We present a negative refractive index (NRI) metamaterial that goes beyond the original split-ring resonator/wire medium and is capable of supporting a backward cone of radiation. We report experimental results at microwave frequencies that demonstrate backward-wave radiation from a NRI metamaterial-a characteristic analogous to reversed Cherenkov radiation. The conception of this metamaterial is based on a fresh perspective regarding the operation of NRI metamaterials. (C) 2002 American Institute of Physics.
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