Composite resonator for use in tunable or fixed filters
AssigneeRS Microwave Company
InventorRichard V. Snyder
Life of this patent
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Abstract
A fixed or tunable resonator. The resonator includes an inner conductor, a hollow outer conductor, and a hollow insulating layer. The hollow outer conductor forms a first inner space. The hollow insulating layer is formed from an outer soft dielectric layer, an inner soft dielectric layer, and a ceramic layer disposed between the soft dielectric layers. The hollow insulating layer includes a second inner space formed by the inner soft dielectric layer. The inner conductor is disposed within the second inner space of the hollow insulating layer, and the hollow insulating layer is disposed within the first inner space of the hollow outer conductor.
Claims16
A transmission line comprising:
- a first conductor;
- a second conductor;
- and
- an insulating layer comprising first and second soft dielectric layers and a ceramic layer disposed between the first and second soft dielectric layers,
- wherein the insulating layer is disposed between the first and second conductors so that the first soft dielectric layer is in contact with the first conductor and the second soft dielectric layer is in contact with the second conductor, and
- the insulating layer is slidably disposed between the first and second conductors;
- wherein the insulating layer is securely attached to the first conductor and slidably coupled to the second conductor.
A resonator comprising:
- an inner conductor;
- a hollow outer conductor comprising a first inner space;
- and
- a hollow insulating layer comprising an outer soft dielectric layer, an inner soft dielectric layer, and a ceramic layer disposed between the soft dielectric layers, the hollow insulating layer further comprising a second inner space formed by the inner soft dielectric layer,
- wherein the inner conductor is disposed within the second inner space of the hollow insulating layer and the hollow insulating layer is disposed within the first inner space of the hollow outer conductor, and
- the hollow insulating layer is slidably disposed between the inner conductor and the hollow outer conductor;
- wherein the hollow insulating layer is securely attached to the inner conductor and slidably coupled to the hollow outer conductor.
A tunable filter comprising:
- a plurality of coaxial resonators, each comprising:
- an inner conductor,
- a hollow outer conductor comprising a first inner space,
- a hollow insulating layer comprising an outer soft dielectric layer, an inner soft dielectric layer, and a ceramic layer disposed between the soft dielectric layers, the insulating layer further comprising a second inner space formed by the inner soft dielectric layer, the inner conductor being disposed within the second inner space of the hollow insulating layer and the hollow insulating layer being disposed within the first inner space of the hollow outer conductor, and
- a conductive short circuiting element configured to connect the inner conductor to the outer conductor;
- and
- a plurality of conductive segments, each of which couple adjacent coaxial resonators.
A method of manufacturing a coaxial resonator comprising:
- providing a cylindrical inner conductor;
- providing a hollow cylindrical outer conductor comprising a first inner space;
- providing a hollow cylindrical ceramic comprising a second inner space;
- providing first and second soft dielectric sheaths;
- encasing the cylindrical inner conductor with the second soft dielectric sheath to form a first assembly;
- applying heat to the first assembly to shrink fit the second soft dielectric sheath about the cylindrical inner conductor;
- encasing the hollow cylindrical ceramic with the first soft dielectric sheath to form a second assembly;
- applying heat to the second assembly to shrink fit the first soft dielectric sheath about the hollow cylindrical ceramic;
- slidably disposing the first assembly within the second inner space of the hollow cylindrical ceramic to combine the first and second assemblies;
- and
- slidably disposing the combined first and second assemblies within the first inner space of the hollow cylindrical outer conductor.
Dependencies are inferred from the claim text.