Exact modelling method for discrete finite metamaterial lens

The authors analyse the properties of metamaterial lens composed of capacitively loaded ring resonators, with the help of an efficient rigorous model suitable for calculating the properties of finite metamaterial samples. This approach takes into account the discrete structure and finite extent of realistic metamaterials. The authors show that the discrete model reveals the effects, which can be missed by a continuous model based on effective parameters and that the results are in close agreement with the experimental data.