Now-a-days in modern wireless telecommunication systems, antennas with smaller size, greater efficiency, and wider bandwidths are in great demand. To fulfill these requirements fractal concept in antennas are very popular which provides compactness and can generate multiple frequencies and also enhances its bandwidth. So this paper presents design and simulation of Square shaped fractal antenna using HFSS 15.0 software. This Square shaped fractal antenna is designed for 3 GHz resonant frequency using FR-4 epoxy as substrate. This antenna incorporates a pin diode integrated on its surface to change the current distribution path which changes the resonance frequency depending on the state of the pin diode i.e. on its on and off position thus making it a frequency reconfigurable antenna.
