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A study on influence of guard band on common-mode current related to a microstrip line

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4 Author(s)
Kayano, Y. ; Dept. of Electr. & Electron. Eng., Akita Univ., Japan ; Tanaka, M. ; Drewniak, J.L. ; Inoue, H.

Influence of guard band on common-mode (CM) current related to a microstrip line (trace) has been studied experimentally and FDTD simulation. As the guard band, copper tape is connected along the entire edge of the ground plane. It is cleared that a guard band parallel to and near a trace is most effective in suppressing the CM current. An empirical formula to quantify the relationship between the position of a trace and CM current of the case with a guard band is proposed. Calculated results using the empirical formula and FDTD modeling are in good agreement, which indicates this empirical formula should be useful for developing EMI design guidelines.

Published in:

Electromagnetic Compatibility, 2003. EMC '03. 2003 IEEE International Symposium on  (Volume:2 )

Date of Conference:

11-16 May 2003