Off-Centre Fed Dipole Suppressing the Radiation of the Feed-Line by a Load Impedance at an Arbitrary Point

摘要

When feeding a straight dipole radiator asymmetrically with a differential line, not only the two unequal dipole arms radiate, but also the feed-line itself radiates together with all possible components connected to it. This is because of the partially non-balanced currents on the two feed-line conductors. Therefore, the feed-line contributes significantly to the radiation and its length changes the antenna input impedance. In this work it is shown, that an asymmetrically driven dipole can be neutralized in terms of feed-line radiation by loading the dipole with a suitable impedance at an arbitrarily chosen position.