An analytical approximation for evaluating impact of skew length on radiated emission from differential signal pairs

Author

Fan, Hongmei ; Zhou, Xiaoxia ; Bhobe, Alpesh ; Yu, Jinghan ; Zhang, Hailong ; Sochoux, Philippe

Author_Institution

Cisco Syst. (China) R&D Co., Ltd., Shanghai, China

fYear

2012

fDate

21-24 May 2012

Firstpage

673

Lastpage

676

Abstract

In high speed printed circuit board layout, there usually exist skews between a pair of differential signal traces. In this paper the impact of skew length on electromagnetic interference radiation from differential pairs is investigated. The radiation power is analytically approximated and agreed with numerical simulation tool. It is found that skew control can be done according to the differential pair pitch instead of frequency.

Keywords

approximation theory; electromagnetic interference; numerical analysis; printed circuit layout; printed circuits; 3-dimensional numerical electromagnetic simulations; EMI; analytical approximation; differential pair pitch; differential signal pairs; differential signal traces; electromagnetic interference radiation; electromagnetic radiation; high speed printed circuit board layout; numerical simulation tool; radiated emission; radiation power; skew control; skew length;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetic Compatibility (APEMC), 2012 Asia-Pacific Symposium on

Conference_Location

Singapore

Print_ISBN

978-1-4577-1557-0

Electronic_ISBN

978-1-4577-1558-7

Type

conf

DOI

10.1109/APEMC.2012.6237854

Filename

6237854