Composite conductor having improved high frequency signal transmission characteristics
First Claim
Patent Images
1. A composite conductor having improved high frequency signal transmission characteristics comprising:
- a conductive base having a permeability μ
2 and a conductivity σ
2 ; and
a conductive coating disposed upon the conductive base, the conductive coating having a permeability μ
1 and a conductivity σ
1, such that ##EQU15## wherein the conductive coating has a thickness ranging from about one-half to about five times a skin depth of said coating; and
wherein a current distribution of the composite conductor is redistributed from the conductive base to the conductive coating by employing a conductive base having a higher surface resistance than the conductive coating.
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Abstract
A composite conductor having improved high frequency signal transmission characteristics is provided which includes a conductive base and a conductive coating. The relationship between the conductivity and the permeability of the conductive base and the conductive coating is given by the following expression: ##EQU1##
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Citations
15 Claims
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1. A composite conductor having improved high frequency signal transmission characteristics comprising:
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a conductive base having a permeability μ
2 and a conductivity σ
2 ; anda conductive coating disposed upon the conductive base, the conductive coating having a permeability μ
1 and a conductivity σ
1, such that ##EQU15## wherein the conductive coating has a thickness ranging from about one-half to about five times a skin depth of said coating; andwherein a current distribution of the composite conductor is redistributed from the conductive base to the conductive coating by employing a conductive base having a higher surface resistance than the conductive coating. - View Dependent Claims (2, 3, 4)
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5. A composite conductor having improved high frequency signal transmission characteristics comprising:
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a material having a predetermined high thermal conductivity; a conductive base layer disposed upon said highly thermally conductive material, the conductive base layer having a permeability μ
2 and a conductivity σ
2 ; anda conductive coating layer disposed upon the conductive base layer, the conductive coating layer having a permeability μ
1 and a conductivity σ
1, such that ##EQU16## wherein the conductive coating has a thickness ranging from about one-half to about five times a skin depth of said coating; andwherein a current distribution of the composite conductor is redistributed from the conductive base layer to the conductive coating layer by employing a conductive base layer having a higher surface resistance than the conductive coating layer. - View Dependent Claims (6, 7, 8, 9)
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10. A coaxial cable having improved high frequency signal transmission characteristics comprising:
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a center conductor comprising; a conductive base having a permeability μ
2 and a conductivity σ
2 ; anda conductive coating disposed upon the conductive base, the conductive coating having a permeability μ
1 and a conductivity σ
1, such that ##EQU17## wherein the conductive coating has a thickness ranging from about one-half to about five times a skin depth of said coating; andwherein a current distribution of the composite conductor is redistributed from the conductive base to the conductive coating by employing a conductive base having a higher surface resistance than the conductive coating; a dielectric material disposed about the center conductor; an outer conductor disposed about the dielectric material; and an insulating jacket disposed about the outer conductor. - View Dependent Claims (11, 12, 13)
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14. A coaxial cable having improved high frequency signal transmission characteristics comprising:
a center conductor defined by a conductive base, and a conductive coating disposed upon the conductive base such that ##EQU18## a dielectric material disposed about the center conductor;
an outer conductor disposed about the dielectric material, the outer conductor being defined by,a) a conductive base; and b) a conductive coating disposed upon the conductive base such that ##EQU19## an insulating jacket disposed about the outer conductor.
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15. A coaxial cable having improved high frequency signal transmission characteristics comprising:
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a center conductor; a dielectric material disposed about the center conductor; an outer conductor disposed about the dielectric material, the outer conductor comprising; a) a conductive base; and b) a conductive coating disposed upon the conductive base such that ##EQU20## an insulating jacket disposed about the outer conductor.
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Specification