Patent ID: 8008989
Filing Date: 2011-08-30
Classification: H04B

Abstract:
1. A power line communication system for performing power line communications using carrier waves of high frequencies in the MHz range, the power line communication system comprising: at least one coaxial cable for performing transmission of signals; at least one power line; at least one capacitive signal coupling unit for signal-coupling the at least one coaxial cable and the at least one power line, the at least one capacitive signal coupling unit including an impedance matching circuit; and at least one impedance member to reduce leakage current flowing through the at least one coaxial cable due to impedance mismatching between the at least one power line and the at least one capacitive signal coupling unit, the at least one impedance member showing an impedance of at least hundreds of ohms in the MHz range, the at least one impedance member being separate from the impedance matching circuit.