Power line communications system and coupling circuit for power line communications system

A power line communications system comprising:

• a power line;
• a plurality of outlets individually connected to said power line;
• a transmitter unit including:
• (1) a first ferrite core coupler for:
• (a) isolating said transmitter unit from said power line, and
• (b) coupling information signals from said transmitter unit to said power line,
• (2) a first bandpass filter for selectively passing information signals from said transmitter unit to said power line, and
• (3) a first impedance matching pad for minimizing mismatches between said first bandpass filter and the impedance at an outlet connected to the power line and to which said transmitter unit is connected;
• and
• a receiver unit including:
• (1) a second ferrite core coupler for:
• (a) isolating said receiver unit from said power line, and
• (b) coupling information signals from said power line to said receiver unit,
• (2) a second bandpass filter for selectively passing information signals from said power line to said receiver unit, and
• (3) a second impedance matching pad for minimizing mismatches between the impedance of said second bandpass filter and the impedance at an outlet connected to the power line and to which said receiver unit is connected.

A transmitter unit for a power line communications system comprising:

• a ferrite core coupler for:
• (1) isolating the transmitter unit from a power line, and
• (2) coupling information signals from the transmitter unit to the power line;
• a first bandpass filter for selectively passing information signals from the transmitter unit to the power line;
• and
• an impedance matching pad for minimizing mismatches between said bandpass filter and the impedance at an outlet connected to the power line and to which the transmitter unit is connected.

A receiver unit for a power line communications system comprising:

• a ferrite core coupler for:
• (1) isolating the receiver unit from a power line, and
• (2) coupling information signals from the power line to the receiver unit;
• a bandpass filter for selectively passing information signals from the power line to the receiver unit;
• and
• an impedance matching pad for minimizing mismatches between the impedance of said bandpass filter and the impedance at an outlet connected to the power line and to which the receiver unit is connected.