Patent EP0258028A2 successfully refreshed from Google Patents.
EP0258028A2
Expired / Lapsed
EP
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Electrical cables
Assignee: Leland Stanford Junior University
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Filing: 1987-08-24
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Granted: —
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Expires: 2007-08-24
Abstract
Abstract An electrical cable has improved signal transmission characteristics, low attenuation, constant phase and group velocity and constant and nearly ohmic characteristic impedance over a wide frequency band by providing low magnetic inductance (23) along with the shunt capacitance of the insulation (22) surrounding the conductor (21). The low loss inductance can be provided by particulate magnetic material, such as ferrites, homogeneously distributed in the insulating material or alternatively the inductance can be provided by ring(s) of magnetic material concentric with the conductor or by layer(s) of magnetic material when the conductor(s) are flat.
Inventors
- 👤 Bruce B. Lusignan
- 👤 Simos D. Dadakarides
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 03:11
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/44; G02B6/4401; G02B6/4415; G02B6/4416; G02B6/4417; G02B6/4419; H; H01; H01B; H01B11/00; H01B11/02; H01B11/12; H01B11/14; H01B11/146
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
60 words
An electrical cable comprising a conductor (21; 31; 41; 51; 61, 62; 68; 81) and insulative material (22; 32, 33; 43; 52, 53; 64; 71; 82) abutting said conductor and having shunt capacitance associated therewith, characterised by means (23; 32, 33; 42; 52, 53; 63; 83) for providing inductance along with said capacitance thereby reducing the attenuation of said cable.
Claim 2
Dependent Claim
60 words
An electrical cable comprising a conductor (21; 31; 41; 51; 61, 62; 68; 81) and insulative material (22; 32, 33; 43; 52, 53; 64; 71; 82) abutting said conductor and having shunt capacitance associated therewith, characterised by means (23; 32, 33; 42; 52, 53; 63; 83) for providing inductance along with said capacitance thereby reducing the attenuation of said cable.
Claim 3
Dependent Claim
17 words
An electrical cable as claimed in Claim 1, characterised in that said insulative material surrounds said conductor.
Claim 4
Dependent Claim
28 words
An electrical cable as claimed in Claim 2, characterised in that said means for providing inductance comprises particles of low loss magnetic material distributed in said insulative material.
Claim 5
Dependent Claim
25 words
An electrical cable as claimed in Claim 3, characterised in that said particles of low loss magnetic material are uniformly distributed in said insulative material.
Claim 6
Dependent Claim
32 words
An electrical cable as claimed in Claim 3, characterised in that said low loss magnetic material is distributed in alternatively high and low concentrations in longitudinally displaced sections in said insulative material.
Claim 7
Dependent Claim
31 words
An electrical cable as claimed in Claim 2, characterised in that said means for providing inductance includes a number of discrete regions of low loss magnetic material concentric with the conductor.
Claim 8
Dependent Claim
32 words
An electrical cable as claimed in Claim 6, characterised in that said low loss magnetic material is distributed in alternatively high and low concentrations in longitudinally displaced portions in said discrete regions.
Claim 9
Dependent Claim
29 words
An electrical cable as claimed in any one of Claims 3 to 7, characterised in that said low loss magnetic material comprises a member of the Manganese-Zinc ferrites family.
Claim 10
Dependent Claim
27 words
An electrical cable as claimed in any one of Claims 3 to 7, characterised in that said magnetic material comprises a member of the Nickel-Zinc ferrites family.
Claim 11
Dependent Claim
19 words
A twisted pair electrical cable comprising two cables each as claimed in any one of Claims 1 to 5.
Claim 12
Dependent Claim
44 words
A strip line electrical cable comprising a cable as claimed in Claim 1, characterised in that said conductor is formed on a surface of said insulative material, said means for providing inductance comprising a layer of low loss magnetic material in said insulative material.
Claim 13
Dependent Claim
29 words
An electrical cable as claimed in any one of Claims 1 to 5, characterised by a second conductor, said conductors forming a coaxial cable with said insulative material therebetween.
References Cited (Backward Citations)
No citation records indexed.
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