Design of an ultra wideband slotted koch fractal antenna for C-band application

Ultra wideband Fractal shaped planar antenna is proposed in this paper. This paper followed Koch iteration technique to improve the bandwidth of the planar antenna. A circular slot is loaded on the radiating element to increase the current density over the surface of radiating patch. The Koch geometry can be formed by taking the help of a mathematical process i.e. Iterative Function Scheme (IFS). After second iteration the bandwidth is approximately 3GHz but return loss is found to be just below -15dB. After inserting a circular slot on the patch, fractional bandwidth improves up to 56.25% ranging from 3.6GHz to 7.2GHz with better reflection loss response. This designed slotted Koch fractal antenna presents Omni-directional radiation characteristics over the wide operating range. This proposed fractal antenna is suitable for C-band applications such as cordless telephones, mobile communications, Wi-Fi, Satellite communications etc.