Free-space focused-beam characterization of left-handed materials

Li, Kin; McLean, S. J.; Greegor, R. B.; Parazzoli, C. G.; Tanielian, M. H.
April 2003
Applied Physics Letters;4/14/2003, Vol. 82 Issue 15, p2535
Academic Journal
We used a broadband, free-space, focused-beam system to measure the transmission and reflection in left-handed-material (LHM) slabs. The samples were made of alternating patterns of copper wires and split-ring resonators on Rogers 5880 substrates separated by Rohacellâ„¢ spacers. The measured data show very good agreement with numerical simulations. The measured insertion loss of this structure was -1.1 dB/cm at the LHM pass band. Simulations suggest that the loss may be attributable to the finite conductivity of the copper patterns.


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