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S11 parameter measurement in NFC antenna design

Question asked by Leonardo Rafaelian on Feb 8, 2019
Latest reply on Mar 1, 2019 by Leonardo Rafaelian


I'm designing a NFC antenna for my PN5180 PCD.

I'm doing this based on "AN11740 PN5180 Antenna design guide".

My question is about " Assembly and measurement " level.

Is this step( impedance measurement between TX1 and TX2 pins) done in live mode ?

I mean is it necessary to power on the PN5180 during the measurement or it must be powered off ?