Learning Forum

[mkamrul]

I made a antenna model which have top conductor, substrate and bottom conductor in HFSS 2024 R2, where all my model dimensions are in millimeters. However, when I export the geometry using Modeler > Export > DXF, the resulting DXF file treats all dimensions as meters.

For example, a 30 mm dimension ends up as 30000 meters in the DXF, which completely breaks scale when importing into other tools like ADS or CAD software. (ADS or KiCad detected it as a very large size)

I confirmed this by importing into QCAD, and yes — the drawing is 1000× larger than expected.

❓ Is there a way to force HFSS to export DXF in millimeters, or at least apply unit conversion during export?

If not, what’s the most efficient way to deal with this?

Appreciate any tips from those who’ve dealt with HFSS → DXF → PCB/ADS flow!

[Gia]

1) Use the menu option [Modeler > Units...] 

2) Change the units from [mm] to [um] and check the box 'Rescale to new units'

3) Export the DXF