Coupling communications signals to a power line

H - Electricity – 04 – B

Patent

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H04B 3/56 (2006.01)

Patent

CA 2304678

A power line communications system has a power line (40) having a plurality of conductors (B, R, Y) which carry communications signals. A set of communications signals are coupled to a set of the plurality of conductors, each signal being coupled to a respective one of the set of conductors and the phasor relationship of the set of communications signals is chosen such that radiation of communications signals from the power line is minimised. The phasor relationship may be achieved by phase shifting one or more of the signals. This method allows communications signals to be transmitted at higher power levels, thereby extending range of transmission, while minimising radiation from the line.

On décrit un système de communication sur ligne de transport d'énergie, qui comprend une ligne électrique (40) munie d'une série de conducteurs (B, R, Y) pour acheminer des signaux de communications. Un ensemble de signaux de communications est couplé à la série de conducteurs, chaque signal étant couplé à un conducteur respectif de la série de conducteurs et la relation de vecteur de phase de l'ensemble des signaux de communications étant choisie de manière à réduire au minimum la radiation des signaux de communications émanant de la ligne électrique. La relation de vecteur de phase peut être obtenue par déphasage d'un ou plusieurs des signaux. Ce procédé permet de transmettre des signaux de communications à des niveaux de puissance plus élevés, et donc d'élargir la portée de la transmission tout en réduisant au minimum la radiation émanant de la ligne électrique.

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