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CPWG trace widths and spaces

Question asked by pspear on Dec 15, 2014
Latest reply on May 1, 2015 by Mark_D

The Hittite document "Layout Guidelines For MMIC Components" is a great help but they only provide a single dielectric thickness, trace width, trace space and trace thickness combination that gives a 50ohm trace. It would be great to have a list of other combinations that work well with the various Rogers 4350 standard thicknesses. I noticed that many of the Hittite evaluation boards have trace widths and spaces that differ from the recommendations in the document but unfortunately the dielectric thickness and copper/plating thickness isn't mentioned so it is not so easy to duplicate.

 

Specifically I am looking for something that works well for a trace width of 15 to 20 mils (similar to what the HMC424 or HMC525 evaluation boards use).

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