US 5,179,074 A · Hybrid dielectric resonator/high temperature superconductor filter

Abstract

A waveguide cavity filter having a conductive housing, a plurality of high dielectric constant ceramic resonators disposed within the conductive housing and at least a portion of a sheet of superconductive material which is constrained to be at an ambient temperature below the critical temperature of the superconductor and disposed in contact with at least one of the side walls of the conductive housing and with an opposing surface of each of the resonators, such that the resonators are in close superconductive contact with the side walls of the conductive housing. In particularly, the superconductive sheet is a layer of high temperature superconductor. In a first embodiment of the invention, the resonators in the shape of cylindrical plugs are disposed with a flat surface juxtaposed to the side wall. In a second embodiment, the resonators are in the form of half cylindrical plugs with the axis of the half cylinder transverse to the axis of the resonator, in contact with the superconductor sheet and in juxtaposition to the side wall. In a further embodiment of the invention, the resonators are quarter circular cylindrical plugs and each of the flat side surfaces is in contact with a juxtaposed side wall of the conductive housing through a sheet of superconductive material.

Claims9

Dependent claims

A waveguide cavity having a conductive housing with a first interior wall, and an axis parallel to the first interior wall, and at least one high dielectric constant ceramic resonator element with at least one flat surface disposed within the conductive housing, further comprising:

a temperature control means in thermal communication with the conductive housing;
at least a first superconductive sheet of superconductive material, said first superconductive sheet being maintained at an ambient temperature below the critical temperature for superconduction by said temperature control means, said first sheet being disposed in contact with the first interior wall of the conductive housing and with said at least one flat surface of the at least one resonator element, said first superconductive sheet being sufficient to cover said at least one flat surface, such that the at least one resonator element is in superconductive contact with the first interior wall.

A waveguide cavity having a cylindrical conductive housing with flat interior end walls and a first high dielectric constant ceramic resonator element with at least one flat surface disposed within the conductive housing, further comprising:

a temperature control means in thermal communication with the conductive housing;
a first superconductive sheet of superconductive material, said first superconductive sheet being maintained at an ambient temperature below the critical temperature for superconduction by said temperature control means, said first sheet being disposed in contact with a first one of said interior end walls of the conductive housing and in contact with said at least one flat surface of the first resonator element, the superconductive sheet being sufficient to cover said at least one flat surface, such that the first resonator element is in superconductive contact with the first interior end wall.

Dependencies are inferred from the claim text.

Hybrid dielectric resonator/high temperature superconductor filter

Life of this patent

Hybrid dielectric resonator/high temperature superconductor filter

Life of this patent

Abstract

Claims9