How to correctly establish S parameter simulation schematic of ADL5523 in the ADS?

Question

Hello, 
 Our lab prepare to use ADL5523 to improve the performance fo existing circuits. it works at 433MHz. I have downloaded the ADL5523 s3p file in official website. It is different from s2p, and it use port2(VPOS/VBIAS)to match output impedance. i can't figure out it. 
 So I'm wondering how to establish a correct simulation eschematic for ADL5523 to match the input and output impedance！:( 
 thanks! 
 Vivien

ADIApproved · Accepted Answer

Hi Vivien, 
 Yes the file of the format is a bit different than the typical format. You can see the details on the comment section, 
 ! RF in - port 1 ! bias - port 2 ! RF Out - port 3 
 So you need to assume port 3 as the output of the amp. As an example the gain will be s31 instead of s21. Or you can open the file in spreadsheet and delete the data for port 2 completely. 
 The bias port is also include to show the suppression performance of the bias path. 
 Best, 
 Kagan