A metamaterial with multi-band left handed characteristic

A novel left handed (LH) metamaterial (LHM) with multi-band (MB) LH behavior is numerically and experimentally studied based on three split ring resonator pairs (SRRPs). The SRRPs are patterned on both sides of a single dielectric slab, featuring three magnetic resonances and two electric resonances. By cautiously designing the dimensions of each SRRP, the magnetic resonances and electric resonances can be individually controlled, and the resulting negative permeability and negative permittivity can be overlapped to engineer a MB LHM. The multiresonant mechanism has been studied from field distribution analysis and circuit model analysis. For demonstration, a prototype example was fabricated and measured. Good agreement between simulation and measurement is observed. Measurement results indicate two bands of negative refractive index (NRI) in 7.41–7.74 GHz and 9.8–10.4 GHz. The suggested novel LHM opens an alternative to prepare the cloaks, absorbers, antennas, and frequency selective surface (FSS) suitable for multifrequencies.