Abstract
AbstractA bandwidth enhancement for metamaterial microstrip antenna is presented for ultra‐wideband (UWB) applications. The metamaterial antenna consists of irregular figures etched on the upper patch periodically and a planar metallic ground carved by grid patterned gaps on the bottom patch. The overall dimension of the proposed antenna is mm3. Experimental results show that the relative impedance bandwidth (–10 dB) of the proposed antenna is 168.3% with the ranging from 2.9 to 33.7 GHz, whose relative bandwidth is improved by 38.9–121.9% than the previously reported wideband ones. Its simulated reflection coefficient has a good agreement with the measured one, and its gain varies from 1.30 to 7.17 dB, meanwhile, it has a maximum radiation efficiency of 95.6% in the operating frequency band. Besides, the end‐fire directional radiation in the high frequency band is observed. Thus, the proposed antenna could be a potential candidate for UWB wireless communication systems.
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