Carrier current system

A carrier current system is defined as a system, or part of a system, that transmits radio frequency energy by conduction over the electric power line to a receiver also connected to the same power line. A carrier current system can be designed such that the signals are received by conduction directly from connection to the electric power line (unintentional radiator), or the signals are received over-the-air, due to radiation of the radio frequency signals from the power line (intentional radiator).