Effect of measured distance and angle tuning on transmission properties of split-ring resonators

Transmission properties of a layer of split-ring resonators (SRRs) are investigated experimentally in free space with the propagation direction of the electromagnetic field perpendicular to the SRR-patterned substrate. It is shown that the response frequency of SRRs is independent of the measured distance. In addition, the qualitative change from electric resonance of SRRs to magnetic resonance with the variation of angle between electric field and the symmetric axis of SRR is presented. The results suggest a simple way of obtaining magnetic resonance of SRRs, even left-handed behavior.