Step by step investigation of near field radiated mitigation at an IT computer board

Zenkner, H.; Khan-Ngern, W.

doi:10.1109/APEMC.2008.4559999

Step by step investigation of near field radiated mitigation at an IT computer board

Author(s)

Zenkner, H.

Khan-Ngern, W.

Date Issued

September 19, 2008

Type

Conference Paper

DOI

10.1109/APEMC.2008.4559999

Abstract

This paper demonstrates the magnetic near field coupling between two ports at a computer board. Based on a failed radiated emission measurement result the coupling is found by evaluation with a probe and a spectrum analyzer and different electronic modifications like filtering and cable routing. The electromagnetic filed mitigation at a parallel port with integrated capacitors is based on the maximum efficiency which is determined by the impedances of noise source, peripheral cables and filter capacitors.

Citation

2008 Asia Pacific Symposium on Electromagnetic Compatibility and 19th International Zurich Symposium on Electromagnetic Compatibility Apemc 2008, 811-814, 2008