Effect of AMC sidewalls structures in parallel plate slot antennas

Electromagnetic band gap (EBG) structures have unique properties in controlling the propagation of electromagnetic waves. We analyse the effect of EBG sidewalls acting as artificial magnetic conductor (AMC) sidewalls, first in a parallel plate waveguide and, as practical application, in parallel plate slot antennas. These structures present some interesting properties that may overcome some of the problems of conventional technologies. The results of the effect of using AMC, in comparison with a perfect electric conductor (PEC), in the sidewalls of the parallel plate slot antennas are presented as application examples. Using AMC sidewalls in this kind of antenna, relatively uniform field distributions are improved, so it allows the directivity to be increased and the efficiency to be enhanced for these antennas.