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is 20 dB RL possible with a combline round off for EM grid ?

Question asked by mlabro on Jan 23, 2005
The example of 2200 bandpass filter in the synthesis manual rounds off all dimensions to a 5 mils grid. So, the only element tuneable are capacitors. Final RL is not very high.
What is the method to follow from mfilter, optimize to em to have a chance to keep a good RL ? A finer grid ? set the lines dimensions to a 5 mils grid while allowing tuneable spacings ... ?