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Design of impedance matching couplers for power line communications

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3 Author(s)
Rodolfo Araneo ; Department of Electrical Engineering - ¿Sapienza¿ University of Rome Via Eudossiana 18, 00184, Rome - Italy ; Salvatore Celozzi ; Giampiero Lovat

The low-voltage powerline communication (PLC) field constitutes today a hot open research area. Powerlines, that often already exist to support energy distribution, can provide an economical broadband medium for high-speed reliable communication traffic, not only for equipment monitoring, protection, and control purposes, but especially today for supporting the smart home technology. However, despite several attractions, the low-voltage electrical network provides an unfriendly environment for data communications. Besides interferences, noise, attenuation, and multi-path reflections, the extremes as well as the unpredictability of the access impedance are limiting factors in the performance of PLCs. This paper presents a preliminary study about a possible methodology of designing an optimal broadband impedance matching circuit (BIM) for providing gain equalization and mitigation of the effects of low-impedance loads on the PLC modem in a wide frequency range. The design is achieved in successive steps by means of the Vector Fitting method, rational parametric approximation of the driving impedance and nonlinear optimization through a novel Meta Particle Swarm Optimization (MPSO).

Published in:

2009 IEEE International Symposium on Electromagnetic Compatibility

Date of Conference:

17-21 Aug. 2009