Author Topic: Coupled microstrip and other transmission line types in Altium  (Read 5408 times)

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Offline shadewindTopic starter

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Coupled microstrip and other transmission line types in Altium
« on: October 22, 2011, 01:09:41 pm »
Hi,

I'm using Altium designer for a board where some traces need controlled impedance, for example Ethernet trace. I'm not very good with this but from what I can tell, differential ethernet traces should be routed as coupled microstrip lines which has reduced impedance when compared to a normal single ended trace. The problem is that Altium does not seem to take this into account?

Also, I can see no option for doing things like Co-Planar Wave Guides either. Am I missing something?
 

Offline EEVblog

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Re: Coupled microstrip and other transmission line types in Altium
« Reply #1 on: October 22, 2011, 09:41:24 pm »
I don't think you aren't missing anything, Altium Designer is quite poor in that area.
It can do basic diff pair stuff (and don't marketing love to sell that as the be-all-end-all), but beyond that it's as dumb as a brick.
It won't take polygons into account as ground planes for example, and it certainly is not field solver based.

Dave.
 

Offline shadewindTopic starter

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Re: Coupled microstrip and other transmission line types in Altium
« Reply #2 on: October 23, 2011, 12:10:49 am »
Yeah, I guess I'll just make manual rules for the traces in question instead.
 


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