The Radiation Field of an Unbalanced Dipole

A method is described for obtaining the expression for the magnitude of the electric field in the distant zone of an ordinary dipole antenna with unequal branch currents. The result is found to involve two functions of the vertical angle, both of which have appeared separately in previous literature. Useful plots of each of these functions in terms of a parameter h are included. Curves for the magnitude of the distant-zone electric field are plotted in terms of two parameters h and k. Illustrative field patterns are obtained experimentally and are plotted for common dipole lengths.