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Simulated reflectance response analysis using Rogers RT Duroid as substrate. S11 plot for the proposed four antenna structures for the substrate Rogers RT Duroid 5880. The number of bands for the proposed four structures is 7, 6, 3 and 1. Minimum reflectance responses are, respectively, −33.79 dB, −34.54 dB, −13.79 dB and −10.05 dB. The resonance frequency is 6.49 GHz, 6.52 GHz, 8.83 GHz and 8.80 GHz, respectively.
