how to import a *.dxf into momentum

[yzriver]

When I import a dxf into momentum, there is an error saying that the shape of layout can't be recognized. What I did is:
1. File-->import-->DXF (hierarchical)
2. select a dxf file

Is this error from that my dxf file isn't hierarchical? what can I do to import a layout from the dxf and simulate it?

Thanks.

 

[molloy]

Pay attention: momentum doesnt recognize line as contour of your design. It should be a polyline and not just a line. I mean: if you have a metalization you design just like a line convert it into a polyline (autocad let you do this) then it recognize the shape of your structure

hope this helps

regards

stefano

 

[yzriver]

In fact, I could import a dxf file into momentum layout, like I draw a cpw structure with retangle commond. these retangles consists of closed line. Then I save it into a dxf format. Then I import it into momentum. I can see this cpw retangle solid pattern shown in the layout.

However, when I simulate the S parameter, the error mesage is " Mesher inpu does not contain any valid shapes"

Any suggestion to solve this?

Many thanks!

 

[smithchart]

Hi,yzriver:

The error is probably caused by the mismatch between the layer where you metal is imported and the layer-mapping of the substrate.

Go to the layer editor and substrate editor to double check their mapping relationships.

Hope this helps.

Regards,

 

[yzriver]

Thanks!

Yes, the layer import from dxf is needed to modified to the layer where the metal autually is.