Help Momentum simulation in ads 2009

[samsoun]

Hello

I would be very grateful if you could help me solve this problem in ADS.
*
Simulation in ADS my system shows a perfect result for "schematic system" (my system is well adapted) but with "layout circuit" the system becomes no more adapted.
*
Can you, please, help me to solve this problem, I tried many times and I consulted the forums but unfortunately I can not find a solution.

You will find attached a detailed description of my system.
*
Sincerely,

https://obrazki.elektroda.pl/8752543500_1397040556.png
https://obrazki.elektroda.pl/3279567300_1397040556.png
https://obrazki.elektroda.pl/9807365000_1397040557.png
https://obrazki.elektroda.pl/8952903600_1397040557.png
https://obrazki.elektroda.pl/9382760800_1397040557.png

 

[volker@muehlhaus]

You have tried to use a schematic "ground" symbol in layout. This doesn't work.

You need to draw a via instead. Then, make sure that the layer with the via polygon is mapped in your substrate as conncetion between cond and the ground plane.

 

[samsoun]

Many thanks for your response

I draw a ground plane, but the problem still not resolved.

https://obrazki.elektroda.pl/9741845600_1397227953.png
https://obrazki.elektroda.pl/2179346000_1397227953.png

 

[volker@muehlhaus]

I draw a ground plane, but the problem still not resolved.

You misunderstood what I wrote. The problem is that in layout, C13 and C14 are not connected to ground.

 

[samsoun]

Please can you mention the different step necessary to draw the ground plane.

 

[volker@muehlhaus]

The ground plane is at the bottom of the substrate. In Momentum, you have created this already (GND). Just define a via layer in the Momentum substrate that connects top side (cond) with the bottom side (GND), and then draw a via circle on that layer.

 

[samsoun]

I'm sorry to disturb you, But this is my first time I'm working on the ADS
Please can you tell me if this design is correct.

Thanks

https://obrazki.elektroda.pl/2123539100_1397392169.png

 

[volker@muehlhaus]

Looks correct to me:

- the yellow circles (for the vias) are drawn on "cond2"
- in your substrate you have mapped "cond2" as a via between "cond" and bottom GND.

So yes, this should work. The yellow vias will create the connection to ground.

 

[samsoun]

With "layout circuit" the system still no adapted

 

[volker@muehlhaus]

Maybe you made a mistake with the co-simulation setup, where you connect the EM results from Momentum to the circuit components.

Google keyword: "Momentum co-simulation"