how to control my active modes on floquet port

[luiGarcg]

Hi everyone,
I'm developing an FSS using PyAEDT for my academic project, and there's one thing I haven't been able to solve.

I need to plot the results for each mode individually on the Floquet Port (TM, TE). In other words, I would like to plot the S21 parameter when only the TM mode is active and the TE mode is disabled, and vice versa.

However, I couldn’t find a way to control or isolate the active modes on the Floquet Port using PyAEDT.
I'm using HFSS version 2025.1.
Does anyone know how to achieve this or have any examples?

Any help would be greatly appreciated.
Thanks in advance!

port1 = hfss.create_floquet_port( assignment=[top_face], name="port1", lattice_origin=[min_x, min_y, max_z], lattice_a_end=[max_x, min_y, max_z], lattice_b_end=[min_x, max_y, max_z], modes=2, deembed_distance=distance, renormalize=False )

[Samuelopez-ansys]

Hi @luiGarcg ,

I think you can grab the trace names, and then do some processing to perform what you need. Here you have an example:

https://examples.aedt.docs.pyansys.com/version/dev/examples/high_frequency/antenna/fss_unitcell.html

Please share more information if this answer is not enough.

Thanks

[luiGarcg]

I’ve been testing your solution, but I’m still unsure if I fully understand it. The trace names don’t explicitly mention the TE and TM modes.

Here’s the list of all traces from my application:

[ 'dB(S(port2:2,port2:2))', 'dB(S(port1:1,port1:1))', 'dB(S(port2:1,port2:1))', 'dB(S(port1:2,port1:2))', 'dB(S(port2:2,port1:1))', 'dB(S(port2:2,port2:1))', 'dB(S(port2:2,port1:2))', 'dB(S(port1:1,port2:2))', 'dB(S(port1:1,port2:1))', 'dB(S(port1:1,port1:2))', 'dB(S(port2:1,port2:2))', 'dB(S(port2:1,port1:1))', 'dB(S(port2:1,port1:2))', 'dB(S(port1:2,port2:2))', 'dB(S(port1:2,port1:1))', 'dB(S(port1:2,port2:1))' ]

What I’m trying to do is disable one of the two modes (TE or TM) on the Floquet ports — specifically as shown in the image below:

Is there a way to control which Floquet modes are active (e.g., deactivate TE or TM individually), either through the PyAEDT API or in the setup configuration?

Thanks in advance!

[Samuelopez-ansys]

Hi @luiGarcg , I increased the number of modes because I think it will be more representative.

I have one Floquet port (called p1) with 4 modes.

Here are all the combinations, where first you can the port name (p1) and then separated by a semicolon the mode:

If your question is if it is possible to know which mode corresponds to which polarization state, it is not possible yet, and we can request that feature to Ansys development. In the first picture you can see how mode 1 corresponds to TE, mode 2 to TM ....

In your specific case, if you want the S21 when the mode 2 is disabled, you just need to plot 'dB(S(port2:1,port1:1))', because in this case the mode 2 is disabled. Of course, you can get the S21 with the cross polarization: 'dB(S(port2:2,port1:1))'

If you have additional doubts please submit an Ansys technical support request.

Thanks!

[luiGarcg]

Thanks a lot for the help! That really cleared things up. Appreciate you sharing your knowledge.