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LSSP Simulation for Floated RF Port is Reliable?

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Hi,

Hope you are doing well and stay fine. I am working on designing cross-coupled or differential RF Rectifiers using Cadence. Rectifiers are highly non-linear devices that cannot be charecterized by SP analysis, so we have to use LSSP simulation instead. I have tried finding the magnitude and phase and convert it to Z parameters to be able to match the input, I use the complex conjugate value of the simulated valuein the port to be able to see if the LSSP shows the port is matched or not, but the new results does not show the matching and the results are even worse. Therefore the question arises here that can we rely on the LSSP simulations if the port is floated like what I have in the attached schematic?

How the port calculates the S11?


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