I'm new to CST, and am having trouble understanding how port impedances connect to the calculated results. I set up a very simple PEC wire loop connecting two discrete ports, so I could change the port impedances and see the port I and V change. However, I get the same answer for I, V, and power regardless of how I set the impedances of the two ports.

Attached is my model, the definition from the documentation, and the circuit that I think should correspond to my model at DC. For fixed R1, since I^2 R1 = 1 Watt, I should be fixed, so if we make R2 very large the voltage should also get large. But it stays at the value for R2=50 Ohm. Clearly there's something I'm missing here.

I'm using CST Studio Suite 2017.