Mean Effective Gain of Compact WLAN Genetic Printed Dipole Antennas in Indoor-Outdoor Scenarios

Two dual-printed dipole antennas for WLAN applications operating in the 802.11 a/b/g (2.4-2.5 Ghz and 4.9-5.875 GHz) frequency bands are presented. Genetic Algorithm optimization (GA) is applied first, to a classical dual band printed dipole antenna schema. Later on, a pre-fractal technique is proposed on the larger strip and electromagnetic parameters are re-optimized to achieve a more compact radiator. Frequency performance of both antennas is introduced showing a VSWR< 1.5 for a input impedance of 50 Ohms. Finally, the mean effective gain (MEG) is worked out considering several scenarios. Results for both antennas for typical indoor and outdoor environments are given using the statistical angle of arrival behavior of such environments.