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Abstract
In this paper, the band notched ultra wide band coplanar waveguide (CPW) fed slot antenna is presented. A rectangular slot antenna is excited by a 50Ω-CPW with a fractal patch. The antenna was studied experimentally regarding impedance bandwidth and radiation patterns. For the proposed antenna, the –10 dB return loss bandwidth could reach 7.45 GHz (3.1 GHz–10.9 GHz), in which a frequency notched band from 4.65 to 6.08 GHz was achieved. The impedance band width for UWB design is about 111% with respect to the centre frequency of 7 GHz. Details of the antenna design, simulated and measured results on the return loss and the E- and H-plane radiation pattern of the proposed antenna are presented. The simulation is performed using the commercially available simulation software Ansoft HFSS.