Study of Electromagnetic Noise Coupling in Wireless-LAN Communication System

Mizuki IWANAMI  Hiroshi FUKUDA  Manabu KUSUMOTO  Takashi HARADA  

IEICE TRANSACTIONS on Communications   Vol.E93-B    No.7    pp.1776-1780
Publication Date: 2010/07/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E93.B.1776
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Advanced Electromagnetic Compatibility Technology in Conjunction with Main Topics of EMC'09/Kyoto)
Category: PCB and Circuit Design for EMI Control
packet error rate,  noise coupling,  amplitude probability distribution,  magnetic near-field measurement,  resonance analysis,  

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This paper shows experimental results of packet error rates (PERs) in wireless-LAN mounted printed circuit boards and gives a discussion on a mechanism of electromagnetic noise coupling that affects the PER. We utilized the amplitude probability distribution to investigate the noise coupling channel. We measured the magnetic near-field distribution to obtain information about noise sources. Based on measurement results, we also performed parallel plate resonance analysis to find out electromagnetic interference antennas. We confirmed that noise radiates from a power supply system of a digital circuit and its coupling to a receiving antenna causes an increase of the PER.