The Transmission of High-Frequency Currents for Communication over Existing Power Networks

The use of high-voltage power lines for carrier-current communication presents a number of difficulties not met in the use of simple communication circuits. This paper tells how these difficulties may be overcome without resorting to complicated transmitting and receiving equipment. The advantages of employing tuned choke coils are described. These chokes are used to isolate the communication channel from the remainder of the power system which gives in effect a simple communication circuit between communicating points.