HomerReid
commented
7 years ago For electrostatic problems I have very recently implemented support for implicit (no discretization) dielectric substrates with ground planes. See here and here.
I haven't implemented this for full-wave calculations like those performed by SCUFF-RF, and don't have plans to do so at the moment, but might in the future.
The strategy most likely to succeed for this problem in the short term is to use regions of surface conductivity, like I mentioned in the example description, but that too will take a little work to document and get working correctly.
rfmichael
I want to calculate the s-parameters of a microstrip circuit. Unfortunately, there are very few examples for Scuff-RF.
I looked at the examples "Capacitance of a PCB stripline trace", but there is a statement saying: "This geometry specification is perfectly adequate for electrostatic problems, but would be not quite right for finite-frequency problems. For such problems I would instead want to define the trace and ground plane as regions of (in this case, infinite) surface conductivity on a closed dielectric boundary surface."
But I don't understand it. Is there a possibility to create an infinite ground plane without discretization (like a boundary condition in FEM or FDTD)?
Can someone create the above-mentioned example for an s-parameter simulation? What would be the best way to model it? Thanks!
PS: The term "stripline" in the above-mentioned example is not correct. It's a microstrip line. A stripline has two ground planes (above and below the transmission line).