Abstract

A link is established between grounding system analysis and microwave engineering. The priority of scattering (S) parameters over impedance (Z) parameters is justified in the high-frequency representation of grounding systems. Following microwave theory, it is shown that the harmonic impedance of the grounding system can be uniquely determined from the S-parameters without path integration over the induced electric field from the remote earth. Besides, guidelines are presented to map a grounding structure to a microstrip circuit for efficient analysis using either personally developed codes or commercial electromagnetic software. An emphasis resides on computing the harmonic impedance by method of moments (MoM). The obtained results agree with previously reported MoM solutions, the finite element method (FEM), the finite-difference time-domain (FDTD) method, and the improved transmission line (TL) method.

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