Improved multi-cavity dielectric filter

Abstract From the Canadian patent

A multi-cavity dielectric filter 30 having a single housing 32 for a plurality of, resonant cavities 65. The dielectric filter 30 has a plurality of dielectric resonators 42, placed inside housing 32 instead of in individual housings, wherein the resonators 42 are, spaced a quarter wave apart and are electrically isolated from one another by conductive, isolation plates 44 positioned therebetween. The isolation plates 44 do not make, continuous mechanical contact with the interior conducting surface of housing 32, but, rather are spaced from the inner surface 77 of housing 32 thereby making , assembly of, the filter much simpler than if a solid RF connection had to be made. The …