MOM and Schematic not matching

Hello everyone,

I am using ADS 2012.08 and I am designing a Power Amplifier for 5.9 GHz. Regarding this situation I chose NPT2018 transistor and I'm using the ADS model provided by the manufacturer.


After doing the Impedance matching networks in schematic (using optimizations and goals) I am now trying to do the momentum simulation and the results have been catastrophic. I think I have considered the proper way of doing it, specially considering rough transitions.

Attached you can find the output schematic and layout versions. What is happening is that I lost all the gain (-20 dB right now) and efficiency, of course. In the Schematic version the Mgap was used just for layout purposes.

I would like to know what possibly I am doing wrong, since I've configured the substrate as well and I think I set the ports correctly (Ports1,2 and 3 are TML and the other ones are SMD because of the capacitor.

Thanks a lot everyone.

附图/附件

layout.pdf

schematic.pdf

At what part of the OMN do you bias the device?
Have you checked the isolation of the biasTee?
Have you tried to attach the schematic (not MoM) version of OMN you showed to the transistor and optimze the full circuit?
Try to take small parts of the schematic and EM them one by one with attaching them to the schematic after EM'ing.
Try to put a DC-Block or a large cap between SNP ground pin and ground, sometime DC leaks throug the ground pin of SNP.

Hope that helps.
Regards

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