Incident Wave with LatticePairs (periodic structure)

villetiukuvaara

I am trying to simulate an infinite periodic metasurface, using an incident plane wave and LatticePairs, with the wave incident at some oblique angle. This wasn't working and I have simplified the problem to scattering from an infinite dielectric slab (see attached image).

I am aware that this is possible with FloquetPorts, but I would like to use an incident wave to reduce computational cost. I have tried terminating the structure with radiation boundaries and PMLs (where the FloquetPorts would otherwise be). However, it seems that there is not a pure travelling wave on the transmission side (ComplexMag_E is a partial standing wave as in the second attached image).

This makes me wonder: do LatticePairs work with a periodic incident field?

This forum doesn't seem to let me include the *.aedt file so here is a link: https://www.dropbox.com/s/e61fdaq01lgxi26/IncidentPW.aedt?dl=0

Screen Shot 2021-01-02 at 6.04.12 PM.png

Screen Shot 2021-01-02 at 6.10.33 PM.png

pmunaga

Hi @villetiukuvaara,

Thank you for reaching to us.

Please use the "Upload Image" option provided to attach your simulation model snapshots in order to help us serve you better.

Best Regards,

villetiukuvaara

Hi @pmunaga ,

Thank you for reaching out. I attached a screenshot in my post along with the HFSS file, but here are some more screenshots.

Cheers,

Ville

pmunaga

Hi @villetiukuvaara,

Kindly upload the images which you have attached in the first question regarding the incident and transmitted wave. As Ansys employees, we cannot access any attachments in the forum.

You can also check for "Incident waves" section of "Assigning Excitations for HFSS or HFSS-Transient" chapter of HFSS Help document for more details regarding your query.

Best Regards,