How can I export my HFSS project in gerber?

Hi everyone!
I made in HFSS an microstrip antenna and now I want to make a real PCB.
The problem is that the manufacturer want me to give him an gerber file. How can I export my HFSS project in gerber? Do I have to make some intermediate steps? Which?
Thanks in advance

hi..

1-export DXF from HFSS..
2-open it in micowave office
3-import this file
4-paste it in a schematic
5-then export to GER file
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we faced this problem in our graduation project a month ago.. and we could do it correctly.. :D
we manufactured our desgings using both CNC and PCB methods..
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for any question : ramy-azzazi(at)hotmail.com
good luck