ASM based method for the study of periodic metamaterials excited by a slotted waveguide

Numerical simulations of antennas based on periodic metamaterials fed by a slotted waveguide can be excessively time consuming because of the large number of unknowns involved in such structures. The paper depicts how the analysis of the metamaterial can be carried out separately from the classical optimization of the waveguide and how this metamaterial can be studied using the array scanning method (ASM) for which we propose an elegant convergence criterion based on infinite array radiation patterns.