Theoretical study of PBG materials as substrates to enhance antenna performance

In this study, we have performed numerical simulations using the commercial full-wave software CST, in order to show the increasing of the performance of a normal patch antenna. Photonic band gap structures based on one and two-dimensional photonic crystals have been used. The numerical simulation results have enabled us to have better performances. A comparison of simulated results between the antennas alone and in the presence of PBG structure and shaped metamaterials structure has been presented. We show then that the PBG structures contributes significantly to improving the directivity, gain and angular width and provides a better matching of the antenna compared to the shaped metamaterial patterns.