Hello everyone, Recently I have been studying cavity resonators. I noticed that all cavity resonators have air in them, but I was wondering what the effects would be if something other than air was used? For the sake of simplicity lets say we put a dielectric material in it with a dielectric constant of 50. What effect would this have on the resonant wavelength of the cavity and on the cavity in general? What if the cavity was filled with something that was more conductive than air, what would this do?