Novel Monolayer Windmill Structure Left-Handed Metamaterial
Keywords:
Double negative (DNG), lefthanded material (LHM), monolayer, negative refractive index (NRI)Abstract
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.
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