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http://dx.doi.org/10.5394/KINPR.2004.28.8.715

A Study on Design and Fabrication of Broad-Band EMC Filter for PC  

Kim, Dong-Il (한국해양대학교 전파공학과)
Jung, Sang-Wook (한국해양대학교 전파공학과)
Kim, Min-Jung (한국해양대학교 산업기술연구소)
Jeon, Joong-Sung (한국해양대학교 산업기술연구소)
Publication Information
Journal of Navigation and Port Research / v.28, no.8, 2004 , pp. 715-719 More about this Journal
Abstract
This paper deals with EMC filter for a personal computer(PC). A PC contains many sources of noise inside and out, with many connected cables. High noise levels are also emitted from the PC because of high-speed signals. So radiated noise from the computer body may sometimes cause problems. Therefore, we design and fabricate an electromagnetic compatibility (EMC) filter for PC, which is composed of feed-through capacitors and ferrite beads with high permeability. Through extensive test, the proposed EMC filter is shown to have excellent differential-mode and common-mode noises filtering characteristics above 30 dB in the frequency band from 10 MHz to 1.5 GHz. The immunity characteristics are improved more than 10 to 30 dB over the frequency band from DC to 1.8 GHz.
Keywords
PC; EMC; EMC; Feed-Through Capacitors; Ferrite Beads;
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