ANALYSIS OF PLANE WAVE COUPLING TO MULTI-CONDUCTOR LINE ABOVE LOSSY SOIL
A b s t r a c t: The paper presents comparison between rigorous electromagnetic model and two approximate
approaches of modeling plane wave coupling to multi-conductor horizontal line above a homogeneous lossy soil. The
first approximate approach is based on quasi-static complex image theory (CI) and the second approximate approach
uses transmission line theory (TL). Our objective is to analyze the numerical error when calculating the current dis-
tribution by when using the proposed approximate models. Here, the reference results are obtained by using the elec-
tromagnetic model (EM) that is based on the full-wave theory and thus developed on least theoretical neglects. The
numerical results of detailed parametric analysis indicate the frequency range of applicability of the proposed ap-
proximate models with rms error of the current distribution less than 10%
Key words: electromagnetic theory; complex image theory; transmission line theory
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