Influence of ground plane to distance dependence leaked electric field from power line

In this paper, we focused attention on the system that used the MHz band in a power line communication, and calculated the influence of electric condition of ground plane to distance dependence and electric field distribution of leaked electric field by method of moments. As a result, we understood the standard ground attenuated leaked electric field to distance as not 20 dB/dec but 40 dB/dec. And we understood the almost uniform attenuation in the standard ground independency of direction from the electric field distribution.