Two cables - different inner and out radii (adjustable) ... change the radii to match and mismatch the cables. You can set a short circuit by making cable 2 have the same inner and out redaii (!) and set Z2 infinite to se the effect of an open circuit.
Electromagnetics ... a "Toy-box" by Alan Murray, University of Edinburgh is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.