Bulletin of the Bureau of Standards, Vol. 12, 465-468 (1916) Scientific Paper 257 (S257)
It is well known that the resistance of the wires is small and that the radiation resistance diminishes rapidly as the wave-length increases. Up to the present no satisfactory theory of ground resistance has been developed. The experimental curves of antenna resistance, on account of the decreasing radiation resistance, fall rapidly at first, as the wave-length is increased, and then, as the wave-length is further increased, remain nearly constant if the ground conditions are good as in the case of a ship's antenna, or again rise nearly in a straight line if the ground conditions are poor. This rise may be very rapid in the case of peculiarly poor grounds. For instance, the resistance of the Bureau of Standards antenna rises from 13 ohms at
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