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PCB Ground Structure Improvement for Radiation Noise Reduction  

송상화 (아주대학교 전자공학부)
권덕규 (아주대학교 전자공학부)
이해영 (아주대학교 전자공학부)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.14, no.3, 2003 , pp. 233-238 More about this Journal
Abstract
With the growth of high speed circuit, unwanted system noise is increased and multipoint ground is used to reduce this noise. PCB screw ground structure has radiation noise by ground loop between screws. In order to solve this problem, in this paper, we proposed improved PCB ground structure. Proposed structure improves noise absorption by using microwave absorber and conductive copper tape. We measured radiation PCB noise in the range of 1 ㎓ to 3 ㎓ to investigate proposed structure usefulness. From these results, under 2 ㎓ range proposed structure has noise reduction by 2.62 dBuV/m, which compared with screw ground.
Keywords
Screw; Ground; EMI; PCB; Microwave Absorber;
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