Microwave Imaging of Three-Dimensional Targets by Means of an Inexact-Newton-Based Inversion Algorithm

Table 4

Error measures for different values of the relative dielectric permittivity. Homogeneous dielectric cube.

𝜀𝑟	𝑒data	𝑒RMSE	𝐾opt
1.5	0.78	0.7	3
1.75	0.63	0.66	6
2	0.53	0.64	10
2.25	0.44	0.61	14
2.5	0.38	0.59	16