Abstract

The goal of this paper is to provide the reader with a good understanding on the effects of truncation (errors) in EMI Near-Field probe compensation techniques using Plane Wave Expansion (PWE). In this paper, the truncation error is analytically calculated for a single plane wave measured in the XY-plane. The influence of this error is calculated for the divergence of the electric field used in vector compensation. Also the impact on scalar compensation and vector compensation is demonstrated. Two techniques, (I) using windows and (II) larger measurement areas are evaluated in their ability to reduce this error. Future improvements using these techniques are suggested.

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