Filter utilizing combination of TE and modified HE mode dielectric resonators

摘要

A dielectric resonator filter comprising a metal wall that is configured with metal cavities. Dielectric resonators can be placed in the metal cavities and configured as a set of cylindrical TE mode resonators and a set of rectangular HE mode resonators. Separating walls are disposed between the dielectric resonators, which include tunable irises for electromagnetic mixed coupling between the cylindrical TE mode resonators and the rectangular HE mode resonators. The rectangular HE mode resonators are configured to shift up the TE mode in frequency. This leads to an easy separation of two degenerate HE modes, a wide spurious free stop band and also achieves electric coupling without using any additional coupling member.

主权项

1. A dielectric resonator filter with a combination of TE and HE modes, wherein the HE mode comprises a required HE mode and an undesired orthogonal HE mode, said dielectric resonator filter comprising:
a metal wall for defining a plurality of metal cavities; a plurality of dielectric resonators placed in said plurality of metal cavities, wherein said plurality of dielectric resonators comprise a set of cylindrical TE mode resonators and a set of rectangular HE mode resonators; and one or more separating walls disposed between said plurality of dielectric resonators, wherein said one or more separating walls comprise a plurality of tunable irises for electromagnetic mixed coupling between said set of cylindrical TE mode resonators and said set of rectangular HE mode resonators.