Coupling communications signals to a power line
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United States of America Patent
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Mar 14, 2000
Grant Date -
N/A
app pub date -
Oct 3, 1997
filing date -
Oct 3, 1997
priority date (Note) -
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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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