Figure 2
Simulation results. (a) z-directed electric field distribution of an electric field source with the magnitude of \(\exp (-225{y}^{2})\) is placed in free space and its height is \(0.2m\). The source is placed next to the PEC to achieve only forward-direction’s radiations. (b) z-directed electric field distribution of the similar source as of (a) with the referenced EM medium substrate of supposed materials i.e., \({\varepsilon }_{med}=40y+3\) and \({\mu }_{med}=1\). (c) z-directed electric field distribution of (a) is distantly changed as that of (b). (d) The corresponding radiation pattern of (a), (b), and (c).
