Design and analysis of fractal based UWB monopole antenna

This paper presents the design and analysis of a planar UWB monopole antenna with impedance steps and fractal slots in the ground plane that contributes to ultra wide band characteristics. Here impedance steps as well as Fractal technique is adopted to improve the bandwidth of the antenna in comparison to its non fractal counterpart. The operating frequency of the proposed antenna is ranging from 2.7GHz to 10.9GHz which provides 120% impedance bandwidth, close to UWB specification. The antenna has omnidirectional radiation characteristics and moderate gain throughout its operating band and can be considered as a good candidate for UWB communications.