An Equivalent-Charge Method for Defining Geometries of Dipole Antennas

In this note we discuss a technique for definin”g the geometry of ~:$ipole antenna such that low-frequency parameters of the antenna, such as capacitance and mean charge separat~on distance, are readily calculable. This technique involves the assumption of an appropriate static charge distribution which we call an equivalent-charge distribution. Calculating the potential distribution from the equivalent charge one then chooses two appropriate equipotential surfaces as surfaces for the antenna conductors. With the antenna surfaces so chosen the static potential distribution for the antenna is known. Other parameters, such as the antenna charge and dipole moment, are calculated as integrals over the assumed equivalentcharge distribution.