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So I understand that calibration standard suppliers can provide information (correction table) to take in account the problem in the case of commercial TRL cal kit ( and offering possibility to come back to a real Zo), while uncorrected TRL calibration is actually referred to the used line...
TY for replying but I think I have been misunderstood.. I agree that Scattering parameters are usually referred to a nominal real Z0, but I want to clarify my question asking you a thing related to TRL calibration.
Assume somebody gives you coaxial standards for calibrating a VNA with TRL...
Scattering parameters once a TRL calibration is performed are referred to the Zc of the micro-strip line.
Determining with measurement Zc (that is not an outcome of the calibration process) is a problem ( myabe a next question to ask about).
However from the theory we know that Zc is in general...
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