Directive propagation in two EBG structures: A Comparison

Two methods for the enhancement of directive propagation in two-dimensional EBG structures, consisting of either square or triangular lattices of dielectric rods, are compared. The benchmark is carried out in terms of main radiation and geometrical parameters for a set of configurations, chosen among several arrangements having different number of layers and cylinders per layer. In one mechanism a resonator antenna is attained by inserting a line source in between an EBG cover and a ground plane, while, in the other, the same source is embedded within an EBG material, working near its band-gap edge. The favourable configurations of the two methods are identified together with their strengths and weaknesses.