US 12,749,788 B2Granted

Transmission line with twisted coaxial cables

AssigneeKoninklijke Philips N.V.

InventorsChristian Findeklee, Christoph Günther Leussler

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Abstract

According to the invention, a transmission line (10) for transmitting data and electrical power, comprising a first coaxial cable (20) with a first inner conductor (21) and a first outer conductor (22), and a second coaxial (30) cable with a second inner conductor (31) and a second outer conductor (32), wherein the first coaxial cable (20) and the second coaxial cable (30) are provided with an additional shield which is surrounding the first coaxial cable (20) and the second coaxial cable (30) and/or the first coaxial cable (20) and the second coaxial cable (30) are twisted around each other to form a twisted transmission line (10), and the first outer conductor (22) and the second outer conductor (32) are galvanically insulated from each other. In this way, a transmission line (10) for transmitting data and electrical power is provided which is compatible with use within an MRI apparatus and can be manufactured at low costs.

Claims15

Dependent claims

A transmission line, for transmitting data and electrical power, the transmission line comprising:

a first coaxial cable with a first inner conductor and a first outer conductor;
a second coaxial cable with a second inner conductor and a second outer conductor;
a third coaxial cable with a third inner conductor and a third outer conductor;
and
a fourth coaxial cable with a fourth inner conductor and a fourth outer conductor, wherein:
the first coaxial cable and the second coaxial cable are provided with an additional shield which is surrounding the first coaxial cable and the second coaxial cable,
the first coaxial cable and the second coaxial cable are twisted around each other to form a twisted transmission line,
the first outer conductor and the second outer conductor are galvanically insulated from each other,
the third outer conductor and the fourth outer conductor are galvanically insulated from each other and from the first outer conductor and the second outer conductor,
the first outer conductor is connected to the second outer conductor via at least one first capacitor,
the third outer conductor is connected to the first outer conductor via at least one second capacitor and to the fourth outer conductor via at least one third capacitor, and
the fourth outer conductor is connected to the second outer conductor via at least one fourth capacitor.

9 more elements

A method for operating a transmission line, the transmission line comprising a first coaxial cable with a first inner conductor and a first outer conductor, a second coaxial cable with a second inner conductor and a second outer conductor, a third coaxial cable with a third inner conductor and a third outer conductor, a fourth coaxial cable with a fourth inner conductor and a fourth outer conductor, at least one first capacitor connected between the first outer conductor of the first coaxial cable and the second outer conductor of the second coaxial cable, at least one second capacitor connected between the third outer conductor and the first outer conductor, at least one third capacitor connected between the third outer conductor and the fourth outer conductor, and at least one fourth capacitor connected between the fourth outer conductor and the second outer conductor, wherein the first coaxial cable, the second coaxial cable, the third coaxial cable and the fourth coaxial cable are twisted around each other to form a twisted transmission line, and wherein all outer conductors are galvanically insulated from all other outer conductors, the method comprising:

conducting electrical power via the first outer conductor of the first coaxial cable, the second outer conductor of the second coaxial cable, the third outer conductor of the third coaxial cable, and the fourth outer conductor of the fourth coaxial cable,
transmitting data in a first data transmission direction via the first coaxial cable and the fourth coaxial cable, and
transmitting data in a second data transmission direction via the second coaxial cable and the third coaxial cable, wherein:
the first data transmission direction and the second data transmission direction are at least temporarily opposite to each other, and
the fourth coaxial cable is arranged diagonally from the first coaxial cable to prevent coupling in the first data transmission direction, and the third coaxial cable is arranged diagonally from the second coaxial cable to prevent coupling in the second data transmission direction.

2 more elements

Dependencies are inferred from the claim text.