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how to reduce insertion loss of a cavity filter?

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y99lx

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insertion losses in cavity filter

Dear cavity filter experts,

Please discuss possible solutions for the reduction of insersion loss of a cavity filter. There is no dielectrics in the cavity.

Thanks,
tommy
 

biff44

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cavity filter loss

Choose the right resonator mode for highest Q (see any emag textbook), and silver plate the whole thing.
 

y99lx

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insertion loss filter]

you are right, but the two things you mentioned are commonly used ways. Are there any other tricks?

thanks.
 

Phytech

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Increase ground plane spacing.
 

happyday

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Increase dimension of the cavitys, the bigger cavity must be reduce insertion loss.
 

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