摘要 : Previous works have discussed in detail the difficulties occurring when one applies numerical methods to Hallén's and Pocklington's integral equations for the current distribution along a linear antenna. When the so-called approxi... 展开 Previous works have discussed in detail the difficulties occurring when one applies numerical methods to Hallén's and Pocklington's integral equations for the current distribution along a linear antenna. When the so-called approximate kernel is used, the main difficulty is the appearance of unphysical oscillations near the driving point and/or near the ends of the antenna. Another work has proposed an easy-to-apply, possible remedy to overcome these unnatural oscillations. The basic idea is to define a new current from the near magnetic field produced by the original oscillating current. In the present paper, for the case of an antenna center-driven by a delta-function generator, we place this remedy on a much firmer basis by means of an asymptotic study for the case of the linear antenna of infinite length. We provide specific connections of our study to actual finite-length antennas. 收起