Abstract
A novel wide-band left-handed metamaterial structure is designed based on the theory of the LHM,which is composed of a copper wire and a resonator with closed-rectangular ring which has a cross wire inside.Resonators are used to achieve negative permeability and wires are used to achieve negative permittivity in the new structure.The permeability and the permittivity are simultaneously negative,namely,the effective refraction is negtive and the wave impendence is positive within certain band by proper design.Numerical simulated results show that there has a passband within operating frequency.The real part of effective refraction index is negative and the imaginary part of effective refraction index is approximately zero from 17.6 GHz to 29.0 GHz,meanwhile,the real part of wave impendence is positive within this band.The left-handed characteristic of the left-handed metamaterial is illustrated.Besides,relative left-handed bandwidth is up to 48.9%,far superior to the conventional left-handed metamaterials.
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