Chapter 6, Problem 6.10P

A coaxial cable has a solid copper inner conductor of radius $a=1\text{mm}$ and a copper outer conductor of inner radius b. The outer conductor is much thicker than a skin depth. The dielectric has ${\text{ε}}_{\text{r}}\text{=2}\text{.26}$ and ${\sigma }_{\text{eff}}=0.0002$ at 1 GHz. Letting the ratio b/a vary from 1.5 to 10, generate a plot of the attenuation (in dB/m) versus the line impedance. Use the lossless assumption to calculate impedance.