Hi filter designers!

For narrow single or multiple bandpass filters it is advantageous using cross-coupled filter designs. Since cross-couplings cause total absorbability for desired frequencies, a cross-coupled cavity filter needs fewer resonators than a simple-coupled one, what will result in a better through loss.
CoupleFil reduces the time and effort to reach optimal solution for cross-coupled filters.

You may download a trial version under www.CoupleFil.com