Loop antenna array for IEEE802.11b/g

Two elements antenna array with high efficiency is developed for IEEE802.11b/g in this paper. The antenna element is one wavelength loop over ground reflector. In order to matching the impedance for the desired band, the parasitic small loop is used with the main loop. The measured results of reflection coefficient are smaller than 15 dB and maximum gain 10.5 dBi with efficiency 85% for the desired band. The measurement results are agreed with that of simulations.