Further Information

The physical parameters $ε_{r}^{'}$ and $ε_{r}^{' '}$ correspond to the following equation, where represents the conductivity of the material.

(1)

{\underline{ε}}_{r} = ε_{r}^{'} - j \cdot ε_{r}^{''} = ε_{r} - j \frac{σ}{2 π f ε_{0}}