Question about fabricating Spiral slot antenna

I have drawn a 4-arm spiral slot antenna in CST. The simulated results are good. So I decided to fabricate one to measure it.
However, I can't find a solution to translate the CST file into garbo file which can be accepted by PCB fabricator.
Who can help me? Thank you very much!

Hi fly_fish

transalate it to dxf (autocad format) i think the guy with the gerber can trans. it to gerber. or import the dxf to ads(agilent) then trans. it to gerber.

PL