Arrays of high aperture efficiency wideband EBG resonator antennas

Wideband arrays of high aperture efficiency EBG resonator antennas are proposed and studied in this paper. The performance of these arrays is characterized based on their directivity and the 3dB bandwidth they can provide. Two configurations of ERAs made out of the same superstructure are compared: (a) an array of high aperture efficiency ERAs and (b) a single ERA with multi-point excitation. It is shown that although the footprint of both the configurations is the same, the array is not only more directive but also presents a significantly higher bandwidth potential. Numerical results are presented to demonstrate a configuration approaching a peak directivity of 21.3 dBi over a 3dB bandwidth of 37%.