| 摘要 |
PROBLEM TO BE SOLVED: To provide a power line communication system which prevents the degradation of injection efficiency of high-frequency signals even if a power line impedance changes. SOLUTION: A high-frequency injector 100 relates to a power line communication system, in which high-frequency signals are convoluted, and transmitted and received from a modem 11 to power lines 1 and 6. The high-frequency injector 100 of the power line communication system includes a looped signal line 8 which supplies high-frequency signals, tube-shaped ferrite cores (power line injectors) 2 and 7 which inject high-frequency signals transmitted on the signal line 8 into the power lines 1 and 6, a capacitor (capacitor element) 4 which connects the power lines 1 and 6 to connection points 9 and 10 to bypass high-frequency signals, and tube-shaped ferrite cores(capacitor injectors) 3 and 5 which inject high-frequency signals transmitted on the signal line 8 into the power lines 1 and 6 through terminal lines 4a and 4b of the capacitor 4. COPYRIGHT: (C)2009,JPO&INPIT
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