Matching Impedance in ADS

Hello everybody

I am a little confused with the impedance matching tool utility by ADS.

The source impedance is the impedance of an antenna (50 Ohms) ,the load impedance (Diode/Capacitor/Rload) is 85.643- j464.547. (Zin = Vin/I_Probe1.i)

Am i doing something wrong in my rectifier?

After adding the tool-designed matching network (Single Stub Matching) to the circuit, the real part of the load impedance gets smaller ( I was expecting something near to 50 Ohms), and the imaginary part increases a lot ( i was expecting something about 0 for the reactance)

Can anyone help me with that issue? It's very urgent.

Thanks in avance.

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