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A new method for increasing the bandwidth (BW) of a class of cloaks is presented. Simulation results reveal that the bandwidth of this class of cloaks is increased by embedding the two- dimensional transmission networks in a medium whose refractive index is smaller than unity. The low refractive index medium is realized by embedding several thin wires in a host medium. The overall bandwidth of the proposed cloak for re∞ectance less than i25dB is revealed to be increased by more than 17% compared to its conventional counterpart.

BANDWIDTH ENHANCEMENT OF A CLASS OF CLOAKS INCORPORATING METAMATERIALS