Calculations of alternating slot resonators

I saw Johns nice Slot resonators with alternating slots and spaces. With fixed sizes there is an excel-sheet to calculate it. But how do I calculate the alternating one? Slam

what do you mean? I cant use the excel sheet for that, cause i cant put in 3 types of slat width. if its alternating, which slat size do i have to use?

you don't.. alternating is to make it broadband. Unless you calculate for a couple of FRQ ranges and make a resonator with those calculated slots in one device.

i posted an answer to the wrong question, i had the forum open on 2 pages, I can't delete the post because i'm not a mod so i put the embarassed icon in cause a made a mistake

I see. I just want to know the broadband range of this resonators.