RCS of metal sphere

[Peter1511ogluigi]

Hello
I am trying to compute the RCS of a metallic sphere. I know that for large frequencies, the RCS should tend towards πr² as described in (https://en.wikipedia.org/wiki/Mie_scattering#/media/File:Radar_cross_section_of_metal_sphere_from_Mie_theory.svg).
I have used the example given in https://nbviewer.org/github/NanoComp/meep/blob/master/python/examples/differential_cross_section.ipynb where I have changed the material to metal and multiplied by 4π to acquire the RCS from the DCS.

The problem is that I do not seem to acquire the correct RCS.
If anyone knows what I am doing incorrect, help would be welcomed :D

Here is the code
RCS.txt

/Peter