| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a turnout that can prevent the intensity of a communication signal from extremely decreasing at each branch point from a trunk line to a branch line in an electric power line, and can secure robust communications. <P>SOLUTION: A turnout 1 comprises: a signal branch circuit 8 for preventing distribution power and passing a communication signal of PLC; and a power branch circuit 9 for preventing the communication signal and passing the distribution power, the signal branch circuit 8 and the power branch circuit 9 being arranged in parallel between a trunk terminal Ta1,Ta2 and a branch terminal Tb1, Tb2. With respect to the signal branch circuit 8, the impedance thereof when viewed from the trunk terminal Ta1, Ta2 is matched with the characteristic impedance of a power line 4 in the frequency band of the communication signal, and the impedance thereof when viewed from the trunk terminal Ta1, Ta2 side is higher than the impedance when viewed from the branch terminal Tb1, Tb2. With respect to the power branch circuit 9, the input/output impedance thereof is set to be sufficiently higher than the impedance of the signal branch circuit 8 when viewed from the trunk terminal Ta1, Ta2 side in the frequency band of the communication signal. <P>COPYRIGHT: (C)2013,JPO&INPIT |
