PCB Ground Structure Improvement for Radiation Noise Reduction

방사 잡음 감소를 위한 인쇄회로기판의 접지 구조 개선

  • Published : 2003.03.01

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.

References

  1. IEEE Trans. on EMC v.37 no.2 Power bus decoupling on multilayer printed circuit boards T. H. Hubing;J. L. Drewniak;T. P. Van Doren;D. M. Hoskanson
  2. Proc. IEEE Int. Symp. on EMC v.2 Evaluation of SMT Decoupling Design in a Functioning High Speed PCB J. Fan;J. L. Knighten;N. W. Smith;J. Neely
  3. Proc. IEEE Int. Symp. on EMC v.2 Quantifying Decoupling Capacitor Location J. Fan;J. L. Knighten;A. Orlandi;N. W. Smith;J. L. Drewniak
  4. Proc. IEEE Int. Symp on EMC. v.1 Backplance grounding models for controlling commonmode noise and mechanism D. Moongilan;T. S. Palaniswarry
  5. Proc. IEEE Int. Symp. on EMC. v.1 Grounding optimization techniques for controlling radiation and crosstalk in mixed signal PCBs D. Moongilan
  6. IEEE Trans. On EMC. v.44 no.2 Power Bus Isolation Using Power Islands in Printed Circuit Boards J. Chen;T. H. Hubing;T. P. Van Doren;R. E. Duroff
  7. Proc. IEEE Int. Symp. on EMC. v.1 The Bridging Effect of the Isolation Moat on the EMI Caused by Ground Bounce Noise between Power/Ground planes of PCB J-N. Hwang;T-L. Wu
  8. Noise Reduction Technique in Electronic System Hennry W. Ott
  9. ECCOSORB & MCS EMERSON & CUMING MICROWAVE PRODUCTS, INC
  10. 요업재료의 과학과 기술 v.6 no.1 Ferrite를 이용한 전파흡수체 신재영;오재희
  11. HFSS(High Frequency Simulator Structure)(ver 8.0) Ansoft