LXIII.The electrical properties of the soil at radio frequencies

Summary Laboratory experiments have been made at radio-frequencies to investigate the way in which the effective conductivity σ and the effective dielectric constant ϵ of the soil vary with frequency. The results of the experiments are shown in figs. 7 and 8. The bearing of these results on some problems of the propagation of wireless waves is discussed, and the conclusion is reached that the only satisfactory way of measuring these quantities is to measure them for ground in situ and at the frequency required, either by the tilt method or by means of attenuation curves.