How to tune and adjust band pass cavity on antenna combiner?

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buhafsaek

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band pass cavity tune

i need document or paper to tune and adjust a band pass cavity used on antenna combiner arround 450mhz
 

band pass cavity tune

I'have not docs about.
but if you have a cilindrical cavity, in few words:
1) Tune the Fo: Shortener heigh will increase frequency.

2) shortener (or place nearer to the wall) the lauchers (the loop wires) will increase the Q (will reduce the bandwidth).
 

Re: band pass cavity tune

thanks it is cylindric cavity ,i need a methode with generator spectre analyser etc dummy load 50ohm like this
 

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