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US 12,027,289 B2Granted
Power unit and power cable for mobile communication base station
AssigneeLs Cable & System Ltd.
InventorJong Seb Baeck
Life of this patent
Estimating the term…
Abstract
The present disclosure relates to a power unit and a power cable for a mobile communication base station, which have sufficiently low inductance and thus minimize voltage oscillation regardless of a change of the amount of power transmitted when communication load of a mobile communication base station increases, thereby providing stable communication services, and which enhance workability of connection to a remote radio unit (RRU) at a base station.
Claims19
A power unit comprising:
- an inner conductor including a first plurality of conductive strands;
- an inner insulating layer configured to insulate the inner conductor;
- an outer conductor including a second plurality of conductive strands formed in multiple layers outside the inner insulating layer and wound spirally in a first direction;
- and
- an outer insulating layer configured to insulate the outer conductor, wherein:
- the inner conductor and the outer conductor are formed coaxially to be used as a pair of conductors for supplying direct-current (DC) power, and
- a ratio between a first sum of areas of the first plurality of conductive strands and a second sum of areas of the second plurality of conductive strands is 0.625 to 1.6,
- the inner conductor of the power unit comprises a multiply twisted conductor manufactured by twisting a first subset of the first plurality of conductive strands in a second direction opposite the first direction to form a central twisted strand with a first twist pitch and twisting a plurality of second subsets of the first plurality of conductive strands in the first direction to form a plurality of outer twisted strands with the first twist pitch, and
- the plurality of the outer twisted strands is helically bound around the central twisted strand with a second twist pitch and in the second direction.
6 more elements
A power cable comprising:
- a plurality of power units, each power unit comprising:
- an inner conductor including a first plurality of conductive strands;
- an inner insulating layer configured to insulate the inner conductor;
- an outer conductor including a second plurality of conductive strands formed in multiple layers outside the inner insulating layer and wound spirally in a first direction;
- and
- an outer insulating layer configured to insulate the outer conductor, wherein:
- the inner conductor is formed coaxially to the outer conductor, and
- a ratio between a first sum of areas of the first plurality of conductive strands and a second sum of areas of the second plurality of conductive strands of the outer conductor is 0.625 to 1.6,
- the inner conductor of each power unit comprises a multiply twisted conductor comprising a central twisted strand including at least two conductive strands of the first plurality of conductive strands twisted in a second direction opposite to the first direction at a first twist pitch and a plurality of outer twisted strands each comprising at least two conductive strands of the first plurality of conductive strands twisted in the first direction with a twist pitch, and
- the plurality of outer twisted strands are helically bound around the central twisted strand with a second twist pitch in the second direction;
- and
- a cable jacket covering the plurality of power units.
9 more elements
Dependencies are inferred from the claim text.