Coaxial cable and method of making the same
AssigneeUniform Tubes, Inc.
InventorRobert H. Schafer
Life of this patent
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Abstract
Circuit components such as frequency filters, impedance transformers, and time delay elements are fabricated into an assembly which is electrically and mechanically coupled to the center conductor. A seamless dielectric material is telescoped over the assembly and then the assembly is telescoped into a seamless outer jacket of conductive material. Then the ID of the outer jacket is reduced into contact with the dielectric material surrounding said assembly and center conductor by drawing said jacket through a die.
Claims14
A coaxial cable comprising:
- (a) at least one center conductor,
- (b) at least one circuit component electrically associated with said center conductor and coaxial therewith,
- (c) a tubular layer of dielectric material surrounding said circuit component and said center conductor respectively, and
- (d) a monolithic jacket of electrically conductive material surrounding said tubular layer and exerting radially inwardly directed compressive force on the entire circumference of said tubular layer of dielectric material, said jacket extending along the length of and being coaxial with said circuit component and said center conductor.
A coaxial cable comprising a stepped center conductor, a tubular layer of dielectric material surrounding said stepped center conductor, and a monolithic jacket of electrically conductive material surrounding and compressing the outer circumference of said layer of dielectric material radially inwardly to eliminate any air space there between along the length thereof, said jacket extending along the length of and being coaxial with said stepped center conductor.
A method of making a coaxial cable comprising:
- (a) electrically coupling at least one circuit component to a first center conductor so as to be coaxial therewith,
- (b) electrically coupling said circuit component to a second center conductor surrounded by a dielectric material coaxial therewith,
- (c) surrounding said circuit component and said dielectric material surrounding said second center conductor with tubular dielectric material,
- (d) inserting the thusly formed structure into an oversized jacket of electrically conductive material,
- (e) and then reducing the ID of said jacket to a predetermined ID while said circuit component is inside said jacket to cause said jacket to apply a radially inwardly directed compressive force on said tubular dielectric material and to cause said jacket ID to be spaced radially from the OD of the circuit component by a predetermined distance.
A method of making a coaxial cable comprising:
- (a) surrounding a circuit component and a center conductor with a coaxial seamless tubular layer of dielectric material which will cold flow,
- (b) inserting said structure of step (a) into an electrically conductive jacket, and
- (c) apply compressive force radially inwardly on the entire circumference of said material by reducing the inner diameter of said jacket while said circuit component and said material are inside said jacket to thereby avoid an air film between said jacket and that portion of said dielectric material surrounding said component.
A method of making a coaxial cable comprising:
- (a) surrounding a stepped center conductor with a coaxial tubular layer of seamless dielectric material spaced radially outwardly therefrom and out of contact with said conductor,
- (b) inserting said structure of step (a) into an electrically conductive jacket, and
- (c) reducing the inner diameter of said jacket and the wall thickness of said material along the length thereof while said structure and material are inside said jacket.
A coaxial cable comprising a center conductor having a stepped impedance transformer coaxial therewith, a tubular layer of dielectric material surrounding said conductor and transformer, a monolithic jacket of electrically conductive material surrounding and compressing the outer circumference of said layer of dielectric material radially inwardly toward said conductor to minimize air space between said jacket dielectric material as well as air space between said dielectric material and said center conductor, and said jacket extending along the length of and being coaxial with said conductor.
Dependencies are inferred from the claim text.