The article Antennas – disturbing the thing being measured – open wire lines #2 did a simple analysis of current flows in the model scenario using ideal voltage balun drive with a current balun.
It was mentioned that solution of the lumped values network is only a first approximation and not as good as the NEC solution which properly models the coupled conductors, and their mutual effect on the distribution of currents in the system.
This article reports the NEC current solution decomposed into differential mode and common mode components.
Ideal voltage balun drive
Above is a zoomed in view of the feed point with a balanced pair of voltage sources feeding the line against the ground electrode. Continue reading Antennas – disturbing the thing being measured – open wire lines #4