Filter with dielectric resonators
AssigneeNEC Corporation
InventorsYuhei Kosugi, Shigeo Ogawa
Life of this patent
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Abstract
A dielectric resonator filter applicable to any desired frequency which is required with a microwave band or a millimeter wave band communication apparatus is disclosed. A single base plate made of metal carries therewith a single or a plurality of dielectric resonators, a pair of input/output coupling members, and a pair of input/output connectors all of which are arranged directly on the base plate in a planar configuration. This base plate subassembly is shielded by a cover having a recess in a sectional view which serves as a cutoff range waveguide.
Claims11
A dielectric resonator filter comprising:
- a single flat base plate at least a surface of which is made of metal;
- a plurality of dielectric resonators arranged in an array on said surface made of metal at predetermined intervals;
- a pair of input/output coupling members each formed of a bent thin sheet and arranged on said surface made of metal to face those of said dielectric resonators which are located at opposite ends of said array, said input/output coupling members being mounted such that a surface thereof which electromagnetically couples with a dielectric resonator is perpendicular to said flat base plate;
- and
- a cover mounted to said base plate and formed with a channel which constitutes a cutoff waveguide, said dielectric resonators and input/output coupling members being disposed in said channel.
A dielectric resonator filter comprising:
- a single flat base plate at least a surface of which is made of metal;
- a plurality of dielectric resonators arranged in an array on said surface made of metal at predetermined intervals;
- a pair of input/output coupling members each formed of a bent thin sheet and arranged on said surface made of metal to face those of said dielectric resonators which are located at opposite ends of said array, said input/output coupling members being mounted such that a surface thereof which electromagnetically couples with the dielectric resonator is perpendicular to said flat base plate;
- and
- a cover mounted to said base plate and formed with a channel which constitutes a cutoff waveguide, said dielectric resonators and input/output coupling members being disposed in said channel;
- wherein each of said dielectric resonators is held by a support member having a small tan .delta. value and which is connected to said surface which is made of metal.
Dependencies are inferred from the claim text.