dule
Newbie level 1

Hello everyone, this is my first post here
I have recently started to work with CST and designed few 3dB couplers, FM band. There my experiences were good for results were in accordance with measurements.
But I have hard time trying to simulate combline filter, 4 resonators, UHF band. Simulations take long time and results seem not accurate. I tried to put density control rectangle near critical parts in structure, results are better but I am not sure if they are accurate enough.
Being beginner in using this software I ask for any advice from exp. users. What numbers should I put in Mesh properties? How much should I refine at PEC edges for this resonant structure?
Thanks.
I have recently started to work with CST and designed few 3dB couplers, FM band. There my experiences were good for results were in accordance with measurements.
But I have hard time trying to simulate combline filter, 4 resonators, UHF band. Simulations take long time and results seem not accurate. I tried to put density control rectangle near critical parts in structure, results are better but I am not sure if they are accurate enough.
Being beginner in using this software I ask for any advice from exp. users. What numbers should I put in Mesh properties? How much should I refine at PEC edges for this resonant structure?
Thanks.