Convert S-parameters to RLGC transmission line parameters

rlgc_params = s2rlgc(s_params,length,freq,z0)

rlgc_params = s2rlgc(s_params,length,freq)

`rlgc_params = s2rlgc(s_params,length,freq,z0)`

transforms
multi-port S-parameter data into a frequency-domain representation of an RLGC transmission
line.

`rlgc_params = s2rlgc(s_params,length,freq)`

transforms multi-port
S-parameter data into RLGC transmission line parameters using a reference impedance of
50 Ω.

[1] Degerstrom, M.J., Gilbert, B.K., and Daniel, E.S . "Accurate resistance, inductance,
capacitance, and conductance (RLCG) from uniform transmission line
measurements."*Electrical Performance of Electronic Packaging*. IEEE-EPEP,
18th Conference, 27–29 October 2008, pp. 77–80.

[2] Sampath, M.K. "On addressing the practical issues in the extraction of RLGC
parameters for lossy multi-conductor transmission lines using S-parameter models."
*Electrical Performance of Electronic Packaging,*. IEEE-EPEP, 18th
Conference, 27–29 October 2008, pp. 259–262.

[3] Eisenstadt, W. R., and Eo, Y. "S-parameter-based IC interconnect transmission line
characterization," *IEEE Transactions on Components, Hybrids, and Manufacturing
Technology*. Vol. 15, No. 4, August 1992, pp. 483–490.