Help with Error 47596: Input angle of incidence is our of interpolation range for characterised surface

Hello,
I have two sheets that are declared with RL-GO solver and a characterised surface media. I have an equivalent far field source in the model and it runs well with just the two sheets. However, when I incorporate an electrically large PEC object near the radiator and these two sheets I get Error 47596. Any suggestions on how to avoid these angle of incidence errors? Should I just simulate more angles in the periodic structure simulation that generates the .tr file?
I would upload the characterised surface file, but the .tr file format is not supported on this website for some reason.
Thanks for your help and suggestions,
Luke

Hello Luke,
The error 47596 is related to the relation between the plane wave's incident angles (used to generate a .tr file) and the U vector of the characterized surface medium (using the .tr file).
I think there are two ways to resolve this error. Please try one of two.
1) Please try to change the U vector. (for example, from x=0 & 1 to x=0 & -1)
2) Please add more incident angles of the plane wave (for example, from 0<theta<90, 0<phi<360 to 0<theta<180, 0<phi<360 ) when generating the .tr file. <- Then, you don't have to care about the U vector.
Feko will automatically apply an interpolation when the incident angles in the .tr file are too sparse.
Thank you.
Jaehoon
Thanks Jaehoon,
I wasn't able to execute the first suggestion. It is already working with the present coordinate system in the starting simulation. It's when a new PEC object is added to the scene is when the angle of incidence error comes in.
I think the second suggestion will do the trick. Is there's a step size requirement for the .tr files to where interpolation is guaranteed? Do I need to 1 degree step increments for theta: 0-180 and phi: 0-360?
Thanks,
Luke
Thanks Jaehoon,
I wasn't able to execute the first suggestion. It is already working with the present coordinate system in the starting simulation. It's when a new PEC object is added to the scene is when the angle of incidence error comes in.
I think the second suggestion will do the trick. Is there's a step size requirement for the .tr files to where interpolation is guaranteed? Do I need to 1 degree step increments for theta: 0-180 and phi: 0-360?
Thanks,
Luke
Hello Luke,
Even if the step size is too big, Feko will interpolate without any error.
I think it 's a matter of the accuracy. If the T/R variation is big at certain incident angles, finer step should be required even for those angles.
Sometimes, 0.1 degree can be required as the step.
Regards,
Jaehoon
Hello Luke,
The error 47596 is related to the relation between the plane wave's incident angles (used to generate a .tr file) and the U vector of the characterized surface medium (using the .tr file).
I think there are two ways to resolve this error. Please try one of two.
1) Please try to change the U vector. (for example, from x=0 & 1 to x=0 & -1)
2) Please add more incident angles of the plane wave (for example, from 0<theta<90, 0<phi<360 to 0<theta<180, 0<phi<360 ) when generating the .tr file. <- Then, you don't have to care about the U vector.
Feko will automatically apply an interpolation when the incident angles in the .tr file are too sparse.
Thank you.
Jaehoon