Title :
Step by step investigation of near field radiated mitigation at an IT computer board
Author :
Zenkner, H. ; Khan-ngern, W.
Author_Institution :
Fac. of Eng. & Res. Center for Commun. & Inf. Technol., King Mongkut´´s Inst. of Technol. Ladkrabang, Bangkok
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.
Keywords :
capacitors; circuit noise; electric field measurement; electromagnetic compatibility; peripheral interfaces; spectral analysers; IT computer board; electromagnetic filed mitigation; filter capacitors; filtering-cable routing; near field radiated mitigation; noise source; peripheral cables; radiated emission measurement; spectrum analyzer; Capacitors; Couplings; Electromagnetic measurements; Electromagnetic radiation; Filtering; Magnetic field measurement; Magnetic separation; Probes; Routing; Spectral analysis;
Conference_Titel :
Electromagnetic Compatibility and 19th International Zurich Symposium on Electromagnetic Compatibility, 2008. APEMC 2008. Asia-Pacific Symposium on
Conference_Location :
Singapore
Print_ISBN :
978-981-08-0629-3
Electronic_ISBN :
978-981-08-0629-3
DOI :
10.1109/APEMC.2008.4559999
