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6 Threads found on edaboard.com: Pml Boundary Cst
Hi to all, I want to get a dispersion diagram of a periodic structure where one side should be radiation boundary.How can I get that with cst or HFSS by using the eigenmode solver that don't support,both, radiation(pml) or open add space boundary? I should use an air box on the top. How sufficiently large and what should (...)
Hi, I am trying to simulate the propagation of of EM waves through the ground as well as the reflection from the surface. The main problem with the cad software that I used (HFSS, cst, Semcad) is the pml boundary conditions ? They seem to work only for a single background material and not for two half spaces (air/dielectric). One (...)
All, I am simulating a simple microstrip trace in cst. I am using discrete ports and pml (open + add space) boundary conditions. I notice that S12 does not quite reach 0dB at DC, even with PEC models for the conductors and no dielectric loss. Is there something I should be doing to get S21 -> 0dB? Thanks Ed
Hello, I simulate microstrip configurations, normally using metal boundary. For open structures the boundary has to be sufficiently far from the strip. This results in large calculation rooms, with many senseless mesh cells. I think about it, if I can reduce the calc. room using the open boundary (perfectly matched layer (...)
both boundary condtions use pml (perfectly matched layer). The "add space" enlarges the calculation box automatically for antenna problems, i.e. radiation patterns.
Hi, I was simulating using C*S*T software and I encounter a message saying "inhomogenous material at pml boundary detected" Could I know what does that mean and how about do I go about solving it? Thanks.