# Further Information

The physical parameters ${\epsilon}_{r}{}^{\prime}$ and ${\epsilon}_{r}{}^{\prime \text{}\prime}$ correspond to the following equation, where represents the conductivity of the material.

The physical parameters ${\epsilon}_{r}{}^{\prime}$ and ${\epsilon}_{r}{}^{\prime \text{}\prime}$ correspond to the following equation, where represents the conductivity of the material.