Measurements of the Attenuation of the Electric and Magnetic Fields at Points Close to the Source

The problem of predicting the variation of the electric and magnetic field components as a function of radial distance at points relatively close to the source is of particular interest in electromagnetic compatibility investigations. The authors have recently had the opportunity to make experimental measurements of the rate of attenuation of electric and magnetic fields at points from 3 to 600 feet from the source at a number of different frequencies. The resulting data have application in RFI work as an aid for evaluating interference problems and estimating the effectiveness of radiation suppression measures.