โ Scribed by Zhi Ning Chen
No coin nor oath required. For personal study only.
In order to evaluate the induced currents on the surface of a cylindrical monopole antenna located over a perfectly electric conducting ground plane using cylindrical harmonics, three kinds of "ctitious walls, namely, an electric wall, a magnetic wall, and a combination of both, are arti"cially added above the monopole. The end e!ect, the thickness, and the source of the monopole can be taken rigorously into account in the computations. However, introducing "ctitious walls de"nitely changes the "eld distributions for the di!erent walls. In this paper, the comparison between the calculated "eld distributions for three approximations and solutions of the method of moment is conducted. The e!ects of these "ctitious walls on the convergence of the impedance computations and the electric "eld distributions around the monopole are discussed. Some suggestions regarding how to choose the "ctitious walls are given.
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