Smith charts with Mathcad smithchrt.mcd, by Bjorn Jansson.
Chart Analysis Enhanced with Mathcad, Alen Victor, IBM, March 2001
How does a Smith chart work ?.; By Rick Nelson, Test and Measurement World, July 2001
Derivation of the Smith Chart Equations for Use with MathCAD,” Heriberto J. Delgado and Michael H. Thursby, FIT, IEEE Antennas and Propagation Magazine, Vol. 40, No.2 Page 99-101, April 1998
Mathcad simulation (simulation.mcd)
Measured data file needed for the Mathcad simulation (s11.prn)