Virtual Anechoic Room An Useful Tool for EMI Pre-Compliance Testing

The paper deals with principles of so-called virtual anechoic room, which presents an economical and accessible possibility of ambient signal elimination in open field test site (OFTS) EMI measurement. Some variants of easy and efficient EM ambient cancellation are described and some measurement examples are presented in the article. In general, the radiated and conducted EM measurement based on principle of virtual anechoic room performs sufficiently accurate results without the need of dedicated and cost expensive OFTS or anechoic chamber.