Wendt, Matthias; Budde, Wolfgang; Fuhrmann, Peter;

Network coupler

For a network coupler for network users in a network comprising at least two lines, a simultaneous data and energy transfer is ensured in that the network coupler is formed in such a way that it is suitable for data transfer via the two lines (1, 2) of the network and for coupling out energy from the two lines (1, 2) of the network to which a terminal of a voltage source is coupled, in that the network coupler symmetrically couples energy into and/or out of the two lines (1,2), in that the network coupler couples the data symmetrically, differentially and inductively or capacitively into and/or out of the two lines (1, 2), and in that the network coupler symmetrically terminates the two lines (1, 2).

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What is claimed is:

1. A coupler having a core, said core having a closed perimeter of a thickness, said coupler also including two primary windings and a secondary winding, the two primary windings crossing within the perimeter of said core, the secondary winding being wrapped plural times around said thickness of said perimeter without crossing said primary windings, said secondary winding being comprised of wire that is a plurality of times thinner than said primary windings, said secondary winding being wrapped around said core a larger number of times than the primary windings combined, wherein the primary coils are wired symmetrically to induce identical currents, and wherein the primary and secondary coils are perpendicular to each other as arranged on the core.

2. The coupler of claim 1 wherein the number of turns in the secondary coil is at least five times the number of turns in the primary coils.

3. The coupler of claim 2 wherein the primary coils are thick enough to carry power and data, and wherein the secondary coil is not thick enough to carry the data.