Correct me If I'm wrong, but if I have input 50 ohms, then LC network (using for changing the impedance), and then I connect antenna with 50 ohms, it will change both S11 and S22 the same way. What I do is actually mismatching the device A port, so connected antenna is will not be perfectly matched. But I don't want any reflected power into the device A port.
I hope I've written my thoughts correctly...
I need to clarify, how can I have different S11 and S22 with using same impedance at input and output.
Measuring of the S22 with reference 50 ohm reference impedance is representing, that the antenna "see" mismatched input (cause antenna is also 50 ohm9