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Polarization- and Incident-Angle Independent Negative-Permittivity Metamaterial

This paper presents a novel dual-band negative-permittivity low-impedance metamaterial. The proposed metamaterial shows negative-permittivity properties in the frequency bands of 6.44 - 8.62 GHz and 11.72 - 17.23 GHz irrespective of the polarization-angle and a wide range of incident-angle of the imposed EM wave. This metamaterial can be used for gain enhancement of magnetic sources of EM radiation or magnetic dipole antennas.