Your calculations is not exactly correct.Odd and Even mode impedances are valid only and only if there are 2 coupled lines.But if there are more than 2 coupled lines like in your filter structure , it's hard to say that formulae will still be valid in any case.You forget other interactions between-for instance- first element and kth element.
If you do a EM simulation, you will see that your calculation is not exact but maybe approximate.
Why are you using MCLINs to construct this filter? The unconnected pins on the 4 pin device mean that these connections are not being calculated correctly, they assume something should be connected there. Using the 2 pin MCFIL element, just above it in the Microstrip palette, would be much better and yield more accurate results for a given topology.
Your calculations is not exactly correct.Odd and Even mode impedances are valid only and only if there are 2 coupled lines.But if there are more than 2 coupled lines like in your filter structure , it's hard to say that formulae will still be valid in any case.You forget other interactions between-for instance- first element and kth element.
If you do a EM simulation, you will see that your calculation is not exact but maybe approximate.
Why are you using MCLINs to construct this filter? The unconnected pins on the 4 pin device mean that these connections are not being calculated correctly, they assume something should be connected there. Using the 2 pin MCFIL element, just above it in the Microstrip palette, would be much better and yield more accurate results for a given topology.