feko help

Dear Friends

Someone please provide help about some of my problems in Feko

1- i want to see UTD rays in my poject. I selected decouple UDT in face
but the error message says in PO region triangle thickness should be small and when i used planewave no error but cannot see any ray.
what is the soluton.
2- 2ndly how can I design a loop to make a loop antenna n cadfeko. I am unable to draw loop in cadfeko.

thanks
someone plz provide soluton to these problems

For the 2nd question, I will make a loop in HFSS and export to a file. Then inport in FEKO

Rays are only visible for UTD solutions. The PO is more like shining a torch on something and checking if it is visible. Rays can't be viewed for PO solutions.

For the UTD you have to make unmeshed plates and they have to be a minimum of 3 wavelengths long, otherwise the approximation becomes invalid.

You can try the polyline, elliptical arc, bezier curve or fitted spline. What does your loop look like?
If you want to give it finite thickness then the path sweep tool is very useful.