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

VivienWei on Sep 15, 2017

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

attachments.zip

0 ADIApproved

on Oct 10, 2017 2:03 PM
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
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