A Multi-fractal Planar Antenna for Wireless Applications

This paper presents a Koch-like sided Sierpinski multi-fractal antenna operating in ultra wide band range for wireless applications. The novel idea of multi-fractal geometry is introduced into the conventional triangular patch antenna with microstrip feed. The addition of Koch and Sierpinski fractal techniques gives rise to better impedance bandwidth and return loss characteristics. The proposed antenna exhibits resonant frequency at 5.02 GHz with a return loss of -31.38 dB to satisfy the band specifications for wireless LAN applications such as IEEE802.11a (5.15-5.35 GHz). It is found that the antenna exhibits omni-directional radiation pattern in H plane with a maximum gain of 4.11 dB. The antenna exhibits a stable radiation pattern throughout the operating frequency range of 3.86-5.7 GHz which makes it best suited for WLAN application. The simulation was performed in High Frequency Structure Simulator.