Near-field coupling between broadband over power line (BPL) and high-frequency communication systems

Electromagnetic coupling between a broadband over power line (BPL) system and an HF communication system is discussed in this paper. Numerical analyses using the method of moments were performed to determine the near-field coupling between the BPL and communication systems at 3.5, 7, 14, and 28 MHz. Half-wave dipole and quarter-wave vertical antennas were positioned at 1-m intervals along the power line to find the maximum and minimum signal levels caused by the BPL system. Signal levels induced into the BPL system by a 100-W HF transmitter are also presented.