Amplitude and Phase Curves for Ground-Wave Propagation in the Band 200Cycles per Second to 500 Kilocycles.

摘要

After making several extensions to the formulas of Van der Pol and Bremmer,field strength and phase values of the very low frequency ground wave from a short vertical antenna are computed. The ground conductivity values chosen are 4,0.01,and 0.001 mho per meter. The distances considered range from 1to 1,500miles.