A prototype is shown in the picture. The antenna is actually a large-diameter pipe that rotates around a central coupling device. This coupling contains a magnetically coupled matching transformer to which the feedline and a water supply connects. The feedline is direct burial coax similar to the RG-6 used for satellite receivers. The antenna is supported on triangular frames that in turn ride on rubber-tired wheels to provide insulation.
Rotation is accomplished by water-driven hydraulic motors.
The antenna is actually a large diameter pipe through which water flows at high pressure. The water sprays out along the length of the antenna through small turbines to provide the basic motive force for each of the wheels. The water spray falls harmlessly to the ground where the moisture increases the soil conductivity and thus the efficiency of the antenna. Moving water was chosen as the power source to eliminate a source of noise that would be present if electric or gasoline motors had been chosen. Water consumption only occurs while the antenna is moving.