Coupling communications signals to a power line
First Claim
1. A method of coupling communications signals to a power line having a plurality of conductors, which signals are prone to radiate from the line, the method comprising:
- coupling a set of communications signals to a set of the plurality of conductors, each signal being coupled to a respective one of the set of conductors for propagation along the conductor, the set of communications signals having a phasor relationship; and
,setting the phasor relationship of the set of communications signals such that radiation of the communications signals from the power line is minimised as the signals propagate along the line.
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Abstract
A power line communications system has a power line having a plurality of conductors 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 minimizing radiation from the line.
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Citations
16 Claims
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1. A method of coupling communications signals to a power line having a plurality of conductors, which signals are prone to radiate from the line, the method comprising:
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coupling a set of communications signals to a set of the plurality of conductors, each signal being coupled to a respective one of the set of conductors for propagation along the conductor, the set of communications signals having a phasor relationship; and
,setting the phasor relationship of the set of communications signals such that radiation of the communications signals from the power line is minimised as the signals propagate along the line. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. Apparatus for coupling communications signals to a power line having a plurality of conductors, which signals are prone to radiate from the line, the apparatus comprising:
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a coupling device for coupling a set of communications signals to a set of the plurality of conductors, each signal being coupled to a respective one of the set of conductors for propagation along the conductor, the set of communications signals having a phasor relationship; and
,a device for setting the phasor relationship of the set of communications signals such that radiation of the communications signals from the power line is minimised as the signals propagate along the line. - View Dependent Claims (16)
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Specification