Learning Forum

[Stefano R]

Hello,

I want to simulate a differential pair that is capacitively coupled to a microstrip pair. I made a simplified geometry of my actual resonator. I assigned PerfE boundaries to each microstrip and pad element in yellow. There is no GND plane in this model, the wires act as reference and do not receive direct excitation. I am confused about how to create a port for this model. Any suggestions?

 

I added two lumped ports and edited the sources to be 180 degrees out of phase with respect to each other. I was able to create a differential pair under  "Excitations" using this configuration. This does not give errors and can give a solution, but is it physically correct? Thanks.

 

[Faezeh Ladani]

Hi Srocca,

There are a number of open examples in the HFSS student version which you can install and explore. Go to File>Open Examples...>HFSS>Transmission Lines... Also, explore some other examples in RF Microwave and Filter Folders. These examples will help you learn more about how to assign waveport and lumped ports. You may explore Lumped port excitations as well. 

In general, also make sure that whatever pads or planes you have as ground (or reference) are all connected. 

If you have access to customer portal, file a support ticket and one of our engineers will work 1-1 with you on that. 

[Praneeth]

Hi Srocca,

 

Thank you for reaching out to the Ansys Learning Forum.

 

It is observed that you have posted the same question in another post on the forum with link - How to model differential pair coupled to microstrip. I am closing this post as it is a duplicate to avoid any confusion for other users. Please use the mentioned link only for any follow up questions.

Best regards,
Praneeth.