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A modified printed monopole antenna for ultra-wideband applications

In this paper, a planer printed monopole antenna for Ultra Wide Bandwidth (UWB) applications is presented and discussed. To obtain the required wide response, the base of the monopole is tapered in five steps to match the width of the feeding line as it emerges from the ground plane. A parametric study is carried out for various antenna parameters using the HFSS software tools. The influence of variations and the optimum value of these parameters for UWB response are discussed. The antenna is fed via a microstrip line matched at 50Ω impedance. The simulated and measured results are presented and they show reasonable agreement over the whole UWB frequency band 3.1 to 10.6 GHz.