Figure 4: Comparison between measured (solid lines) and simulated series impedance per unit length (real and imaginary parts) for thin coplanar strips. The strips were supported by a 0.08 cm thick [[epsilon]]r = 2.55 substrate, and the strip dimensions were: d = 0.05 cm, w = 1.3 cm, t = 17 um, and [[sigma]] = 5.8 x 10⁵ S^.cm^{- 1} (copper). : conformal mapping results from eq. 10; Z : imaginary part calculated using Maxwell reg.; 8 : real part calculated using Maxwell reg.; : skin effect resistance only (no current crowding).