SIGNAL COUPLER FOR POWER LINE CARRIER COMMUNICATION

摘要

[PROBLEMS] To provide a signal coupler for power line carrier communication in which coupling efficiency can be increased in high frequency region and surge voltage can be reduced sufficiently. [MEANS FOR SOLVING PROBLEMS] A signal coupler for power line carrier communication employed in power line carrier communication for communicating a high frequency signal using a power line (8) as a transmission line and injecting a high frequency signal into the power line (8) or taking out a high frequency signal from the power line (8) comprises a capacitor (1) of high breakdown voltage connected with the power line, a drain coil (2) connected in series with the capacitor (1) of high breakdown voltage to form a series resonance circuit, and a parallel capacitor (3) connected in parallel with the drain coil (2) to form a parallel resonance circuit.