It is difficult to see what you did there.
Is that a via model?
And did you map the "hole" layer in your Momentum stackup, so that the via element creates a ground connection in the EM model?
Do you see the vias in the 3D EM preview?
PS: When you create the look-alike symbol, you can specify a size or scaling factor, so that it has a more useful size compared to circuit elements.
Yes, I meant to map the "hole" layer as a via layer.
Please show your Momentum stackup.
**broken link removed**View attachment 156854
Looks good to me. If you question the DC path connection, I recommend to build a simple testcase and probe that, by using DC analysis or S-parameters at DC.
I meant a testcase for a DC path.
But looking at your model now, I see ports only at the input and output. Where are all the ports at the circuit components? Did you follow the documented co-simulation workflow?
Those ports already deleted in momentum setup ports.
If i didn't delete, then will get message stating that calibration cannot be done for ports which are placed inside the structure
One more thing for confirmation, vias in ADS layout window should be set as cond layer or via layer?
That's your problem, you can't delete those ports. Then the entire simulation can't work, of course, because components are not connected.
That message is information only, if you forgot to switch calibration off. Calibration is optional, not a must.
The via element in layout has multiple layers, for via ring and the thru hole. The thru hole will create the 3D connection to the ground below.
Cond1Layer= cond
HoleLayer = hole
Cond2Layer= cond2 (doesn't matter, not used here because we use an infinite ground in Momentum)
So vias in this case should be set as this, via ring as cond, and thru hole as hole, right?
Yes, correct. This matches the mapping of layer "hole" that you showed above in your Momentum stackup.
If you look at the 3D EM preview, which you can rotate, you will see the vias. If you don't see them, something is wrong.
But make sure you also add in all the ports for the discretes. Port type = "Direct" is what you need, it uses no port calibration.
What do you mean by port type = "Direct", In ADS Layout port type setup, there is 3 options only : Input, output, Input/output?
As I did all required setup above and still no response S11 0 dB which means something is wrong. Thanks
What do you mean by port type = "Direct", In ADS Layout port type setup, there is 3 options only : Input, output, Input/output?
This is the ports setup in momentum. P1 & P2 for input and output 50 ohm. the rest for components and connection to DC source.
As I did all required setup above and still no response S11 0 dB which means something is wrong. Thanks
I refer to the port calibration setting ("Feed Type"), because that is what your message refers to. In some case, TML isn't possible. ADS will disable it then, and shows the warning. If you don't want the warning, you can disable port calibration yourself, by using "Direct" instead of the default settings (TML).
View attachment 156889
Ok, here we have all the ports. And they don't show up in 3D EM preview?
Most likely it's a trivial mistake, but from the information that you give here, it is not possible to find out where the mistake is. I recommend to contact Keysight support and send them your workspace file.
Thanks alot. From where I can access to the port editor shown above.? And is it required to set all ports to direct including P1 & P2 for I/P and O/P or just for components?
Thanks alot. From where I can access to the port editor shown above.?
And is it required to set all ports to direct including P1 & P2 for I/P and O/P or just for components?
And also how about the ground ports (pins placed on the vias), Is it same as others for other components?
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