A left-handed metamaterial composed of structures with both magnetic resonance and electric resonance

To realise simultaneously negative permittivity and negative permeability in one structure, there must exist both electric resonance and magnetic resonance in the same band for the structure. Based on this principle, we fabricated a structure and investigated its 'double-negative' characteristics by means of numerical simulation and experimental test. Compared with other left-handed metamaterials, this structure exhibits simultaneously negative permittivity and negative permeability and its equivalent circuit is much simpler. Moreover, it has much broader left-handed pass-band in which both the permittivity and the permeability are negative. The structures were fabricated by using screen-printing technology, which is much easier and economical.