Abstract
Hurd's Wiener–Hopf solution for the input impedance of long dipoles is extended to yield analytic expressions for the input admittance, current distribution, and far-field radiation pattern of a linear cylindrical dipole antenna symmetrically loaded with lumped impedances along its length. Results from this model provide a more accurate expression for the current distribution on an infinitely long dipole antenna than previously reported by Shen et al. and are in good agreement with reported experimental and theoretical data. The new expressions give a better insight into the concept of standing- and travelling-wave antennas as well as the difference between loading with passive and active loads.
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