Novel Monolayer Windmill Structure Left-Handed Metamaterial

In this paper, a simple structure made of periodic arrays of windmill structure, printed on only one side of a dielectric substrate, is introduced. Simulation and measurement were carried out for one layer of infinite left-handed material (LHM) slab using monolayer windmill structure. The results showed that by carefully adjusting the dimensions of the windmill structure, magnetic and electric resonances can be coexistent in a frequency range where there are both negative magnetic and electric responses. To further verify the left-handed (LH) properties of this structure metamaterial, effective medium parameters were retrieved and a refraction phenomenon based on a wedge-shaped model was demonstrated. Equivalent circuits for the magnetic and electric resonance were also offered to give a qualitative explanation of the LH behaviours.