Abstract
The emerging smart city concept is the key for a sustainable future. Likewise, smart metering, which employs the power line communications (PLC) to transmit real time data, is one of the main technologies driving the development of smart cities. Nowadays, this attracting technology is becoming more mature, academia and industry are together focusing on developing innovative mechanisms to optimize the design of PLC modems in order to face different challenges related to the harsh PLC channel and the uncontrolled random device connections. Impedance mismatch between the access modem and the network side is among the major barriers to the widespread deployment of the PLC technology. The reactance of the power lines need to be fully matched via an appropriate coupler to meet the access impedance and thus avoiding signal perturbation and power dissipation. This paper presents an impedance matching circuit for Narrow Band PLC (NB-PLC) in CENELEC-A band. We implemented the proposed coupler using the Atmel kit and we conducted extensive simulations and measurements to corroborate the theoretical analysis. The obtained results show a noticeable improvement in signal strength compared to the original cards and the achieved power gain is up to 20 dB.
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