(a) 21.0
(b) 21.9
(c) 21.99
(d) 21.999
(e) 21.9999

Figure 6: Plots of magnitude (top) and phase (bottom) distributions for =1.3 GHz, , , = 6 (cm), forward zone of size of cm and 6561 number of dipoles, for multiple background permittivity values, , in range of 21 to 21.9999. The inclusion is located at (0m, 0m) and its outline is indicated by the dashed lines.