sparameter coupling

could use some assistance or guidance on a filter design I am working on. We design our combline and cavity filter via a coupling matrix. The coupling between resonators are given in coupling bandwidths. A 2 port model is created in HFSS then we extract the sparameters from HFSS then import it into a circuit simulator. We lightly couple each port add a capacitor at the end of each resonator to fine tune the circuit and plot the S21 response. We place a marker at both resonate peak then calculate the couple bandwidth. This is way too much work! How would I go about taking the sparameters data then calculating the coupling bandwidth? Or is it even possible?

A couple of papers describing the proceedure.
Page 108
http://www.macom.com/TechApps/pdf/Na...esign10_07.pdf

Starts on Page 7 (Execellent reference!)
http://www.ansoft.com/hfworkshop04/2...las_Dawson.pdf

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