Tefiku-Sierpinski antenna performance in wireless environments for WiMax and WLAN applications

Multipath propagation effect degrades usually the wireless system performances. Antenna Diversity in one of the several methods that have been studied to mitigate this phenomena. This technique can overcome the multipath fading improving the overall performance of communication system. In order to study the impact of the wireless channel and perform antenna diversity, two parameters must be evaluated: the mean effective gain, and the correlation coefficient between the antennas. In this paper, a polarization diversity schema comprised of two dual-printed dipole antennas for WIMAX and WLAN applications are presented. Next, a diversity antenna based on the pre-fractal configuration is studied in terms of Mean effective gain (MEG) and correlation coefficient for indoor and outdoor scenarios. Results shows a low correlation between the elements which means that diversity gain can be achieved using this schema.