I posted a description it on this forum, just search for my name, rautio, and go to the posting titled EM Accuracy.Īt that posting you will find a pdf describing use of a stripline to test any EM analysis. Stripline is microstrip with an identical substrate and second ground plane above, as well as below. However, there is one well known and understood one: lossless, infinitely thin stripline. Hi smt - There are very few planar structures that have exact solutions. (2) does anyone know of calibrated 2D objects such as a precisely measured and dimensioned parallel plate capacitor that can be used to measure the software package against (dimensions, material, and test results posted)? (1) anyone have experience with this and can comment? At low frequencies this doesn't matter, but at 5GHz and above, the differences become significant. Ansoft recommends using a track that matches the port impedance to minimize modes and other artifacts, yet it seems the more correct answer is without the track. Technically speaking, you should get the same answer, but of course you don't (they're close). Or, you can add a 50ohm track of indeterminate length to the unknown trace, run the same simulation again but this time "deembed" back the length of the 50ohm track.
In Ansoft Designer you have two options you assign an edge port directly on the trace with "gap source", "port solver" and "post process port" checked (normalized to 50ohms) and run the simulation. You want to characterize the trace (is it capacitive, inductive, etc and of what value).
Here's the question: let's say you have an arbitrarily shaped pcb trace on.
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