Microstrip Bandpass Filter How To Calculate The Spacing S In End Coupled Microstrip Bandpass Filter?

How to calculate the spacing s in end coupled microstrip bandpass filter? - microstrip bandpass filter

I am currently developing an end, bandpass filters on the microstrip. I do not understand how the physical dimensions of distance and the microstrip line Can I show my simulation.Plz someone must help me.I know what urgently.thanks Calculate