S-parameters of a microstrip line (including loss)

After calculating the characteristic impedance of the microstrip line using the Hammerstad and Jensen models, I calculated the conductor loss (including roughness according to the Morgan model) and dielectric loss, and converted these values to S-parameters while taking the imaginary part of the characteristic impedance into account.With complex characteristic impedance, it is also possible to reproduce the phenomenon where the impedance appears to increase when measured by TDR.