Dear all,

I am simulating an ungrounded coplanar waveguide (CPW) in CST Studio Suite 2022 with the time (attachment cpw_td) and frequency (attachment cpw_fd) domain solvers.

However, the resulting S parameters differ considerably between the two solvers (see images below).
Why is this? Which settings are wrong?

As I collected more experience with the frequency domain solver, I trust these results more.

Thanks.

CST Studio Suite ​​​​​​​

Frequency domain solver

Time domain solver

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