139. HIGH FREQUENCY ENHANCEMENT OF THE HYBRID ELECTROMAGNETIC MODEL BY IMPLEMENTING COMPLEX IMA

Andrijana  Kuhar; Vesna Arnautovski-Toševa; Leonid Grčev

doi:10.51466/JEEIT172079k

Andrijana Kuhar Faculty of Electrical Engineering and Information Technologies, "Ss. Cyril and Methodius" University in Skopje, Rugjer Bošković bb, P.O. box 574, 1001 Skopje, Republic of Macedonia
Vesna Arnautovski-Toševa
Leonid Grčev

DOI: https://doi.org/10.51466/JEEIT172079k

Keywords: hybrid electromagnetic model, complex images

Abstract

The well know hybrid electromagnetic model (HEM) is widely used for analysis of grounding systems. However, it has been proven that results obtained by HEM diverge from referent results in the high frequency (HF) domain. This paper presents implementation of complex image theory to take into account the earth-air interface instead of the quasi-static images used up-to-date with HEM. Parametric analysis of the achieved improvement in precision of the HEM method on high frequencies is visualized in multiple figures by comparison to referent results calculated by the renowned numerical electromagnetic code NEC-4. It may be concluded from the research presented in this paper that usage of complex images with HEM extends notably the applicability domain of the method.