Abstract: A coupled filter section is formed with a two piece construction. The filter section includes a first portion formed as a first unitary piece which has relief areas therein which define a plurality of cavities, a corresponding plurality of resonators or resonator portions located within each of the of cavities, a plurality of channels allowing magnetic coupling between adjacent cavities, and a plurality of coupling stubs disposed within the channels. The second piece is affixed to the first portion to substantially enclose the relief areas of the first portion. Preferably, the second piece includes post sections which are coaxially aligned with the resonators. The coupled filter section can include coupled triplet and coupled quadruplet sections.

Abstract: A laminate dielectric filter that has an asymmetrical band pass response is formed with a dielectric laminate structure that includes a first dielectric layer, a second dielectric layer and a third dielectric layer. A first resonator element and a second resonator element are interposed between the first and second dielectric layers and are arranged in a spaced apart relationship from one another. The first and second resonator elements each have a first end electrically connected to a circuit ground potential and a second end which is open circuited. Coupling structures are coupled to the first and second resonator elements to provide input/output ports for the filter.