The introduction of a break (or defect) into the geometric periodicity of the EBG material makes it possible to produce an absorption defect and hence to create a narrow passband within a wide stopband.

The EBG material antennas have the advantage of having a very good directivity with reduced dimensions (2D) compared to dish, lens or horn-type antennas. The EBG antenna allows multifunctional modes (multiband and multipolar).

This invention permits to enhance the directivity or the bandwith of EBG antenna.