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Investigation and measurement of indoor low voltage powerline impedance for high data rate powerline communications (PLC)  

박영진 (한국전기연구원)
김관호 (한국전기연구원)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.41, no.8, 2004 , pp. 93-97 More about this Journal
Abstract
Since powerline for powerline communications (PLC) is designed for supplying electric power using 60 Hz wave, they will have different electrical behaviors for high data rate PLC whose bandwidth is allocated between 1 MHz and 30 MHz. Thus, it is necessary to investigate the different properties in this frequency bandwidth for the high data rate PLC. In this paper, low voltage (220V) powerline impedance for indoor high data rate PLC in between 1 MHz and 30 MHz is measured. For measurement a low voltage coupling unit is made and a vector network analyzer is used. A T-equivalent circuit of the low voltage coupling unit is obtained and then powerline impedance is derived by measuring the reflection coefficient of the total powerline network. With the method proposed, impedance is measured in case of a general korean apartment and its property is analyzed. Measurement shows that the average impedance is about 100Ω.
Keywords
Powerline communications (PLC); indoor powerline impedance;
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  • Reference
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