High frequency network multiplexed communications over various lines
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United States of America Patent
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-
Feb 3, 2004
Grant Date -
Jun 13, 2002
app pub date -
Feb 1, 2002
filing date -
May 23, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
An improved apparatus for high frequency multiplexed electrical line communication for cable TV, telephone, internet, security and other control applications over the mid and low voltage power lines and directly through the transformers includes a transmitter, a receiver, a modem, a multiplexer and multiple couplers at each of two or more locations along an electrical line. The couplers have capacitive circuits serially connected with an air-core or dielectric-core transformer. The capacitive circuits resonate with the transformer at a preselected frequency. The coupler eliminates noise and is matched to the characteristic impedance of the line at the preselected frequency, which linearizes communication on the line and allows high speed data and voice communication over long distances.
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