Compact Fifth Iteration Fractal Antenna for UWB Applications

This paper presents a compact fractal antenna operating in the frequency range of 3.1–10.6 GHz that is designed, simulated and tested for UWB application. In the present days, the broadband wireless technology gained popularity due to its large bandwidth, high data rate and low complexity. In 2002 the Federal Communication Commission (FCC) allocated a frequency band of 3.1–10.6 GHz (UWB) for commercial applications. The antenna having the dimensions of 28×28 mm 2 with circular patch printed on the RT/ Duroid 5880 substrate having the height of 1.57 mm with the dielectric constant of 2.2 is discussed. In the circular patch, circular fractals are made up to the fifth iteration. The dimensions of the circular fractals are identified by using the Descartes theorem. The antenna with optimum dimensions is simulated by using the CST microwave studio and it is tested for its performance. The following antenna performance parameters are calculated: return losses S 11 , VSWR, radiation patterns, gain, and group delay. This antenna is fabricated and tested for its performance, and the measured results are noted. The comparison of simulated and measured results indicate that they are in line.