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This paper proposes a new approach to modeling the radio frequency (RF) electromagnetic disturbances in broadband power line communication (PLC) networks using the multi-conductor transmission line (MTL) theory. The model includes a differential-mode (DM) current propagation model and a common-mode (CM) current propagation model. The frequency range of interest is from 1 MHz to 30 MHz. Practical measurements...
A power line communications (PLC) test bed is designed to understand the mechanism of common-mode (CM) coupling from the PLC modem circuitry to the power lines. It is found that the step-down power transformer that provides the DC power supply to the modem circuitry causes significant CM current on the power lines. By removing the power transformer and powering the modem circuitry with an isolated...
One of the major concerns in designing a modem for power line communication (PLC) is the existence of common mode (CM) RF current, which generates radiated emissions that could interfere with some other communications users. Magnetic transformers have long been used in the analog front end (AFE) circuit of PLC modems to transmit high frequency (1 to 30 MHz) broadband signals onto power network and...
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