| 摘要 |
PROBLEM TO BE SOLVED: To provide a communication device which transmits an electric signal through a power line. SOLUTION: A high frequency power line communication device includes a transmitter, a receiver, a modem 14, and a coupler 16 at each of two or locations along an electrical line 18. The couplers 16 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 transformer is a solid-state transformer formed by using at least one transistor. 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. COPYRIGHT: (C)2011,JPO&INPIT |
