Current and Charge Distributions on Antennas and Open-Wire Lines

An experimental investigation has been made of the distributions of current and charge amplitude and phase on cylindrical antennas and on the driving lines. The presence of a stub support modifies the distributions on the antenna only near the junction of the antenna, line, and stub; however, for antenna loads near antiresonance, the distributions on the line as well as the impedances of the structure are altered considerably. A corrective network is defined for the terminal region of the junction. Impedances of theoretical models of antennas, the network, and conventional transmission line equations may then be used to predict the apparent impedances of the structure.