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US 4,641,110 AGranted
Shielded radio frequency transmission cable having propagation constant enhancing means
AssigneeAdams-Russell Co., Inc.
InventorKenneth L. Smith
Life of this patent
Estimating the term…
Abstract
An improved shielded radio frequency transmission cable having at least one center conductor surrounded by a dielectric and a plurality of metallic sheaths surrounding the dielectric with at least two of the metallic sheaths separated by at least one interlayer (preferably braided) that includes insulating material (which may be a good dielectric) and at least one conducting member.
Claims23
A cable comprising
- at least one center conductor,
- a generally cylindrical dielectric means surrounding said center conductor,
- an inner metallic sheath generally concentric with said center conductor and surrounding said dielectric to contain electromagnetic fields and to define a transmission path within said sheath for transmission of radio-frequency signals with a relatively low propagation function,
- at least one outer metallic sheath surrounding and separated from said inner metallic sheath to define a second transmission path between said inner and outer metallic sheaths,
- the space between said separated metallic sheaths containing a dielectric material and an electrically conductive enhancing means, said dielectric material filling a predominate portion of said space,
- said electrically conductive enhancing means being configured to increase the propagation function of said transmission path between said inner and outer metallic sheaths to a value significantly greater than twice said low propagation function of said transmission path within said inner metallic sheath.
3 more elements
A shielded radio frequency transmission cable having
- a center conductor,
- a dielectric material surrounding the center conductor,
- a braided metallic inner sheath surrounding the dielectric material,
- a braided metallic outer sheath surrounding, coaxially with, and spaced from the inner sheath, and
- an interlayer in the space between the sheaths, the interlayer comprising a plurality of braided strands including
- a multiplicity of strands of insulating material, and at least one strand of conductive material.
3 more elements
A shielded radio frequency transmisssion cable comprising in coaxial relationship:
- a center conductor,
- a dielectric material surrounding the center conductor,
- an inner metallic sheath surrounding the dielectric material,
- an inner braided interlayer surrounding the inner metallic sheath,
- an intermediate metallic sheath surrounding the inner braided interlayer,
- an outer braided interlayer surrounding the intermediate metallic sheath, and
- an outer metallic sheath surrounding the outer braided interlayer,
- and wherein at least one of the interlayers comprises strands of insulating material and at least one electrically conductive strand with the aggregate transverse cross-sectional area of the strands of the interlayer comprised predominantly of the insulating material.
5 more elements
Dependencies are inferred from the claim text.