Title :
Mode conversion effects in multi-Gbps telecommunications blade system
Author :
Pitner, Greg ; De Araujo, Daniel N. ; Mi, Minhong ; Mutnury, Bhyrav ; Cases, Moises ; Pham, Nam
Author_Institution :
Ansoft LLC, ANSYS Corp., Austin, TX, USA
Abstract :
Prediction of radiation from multilayer circuit boards is an important problem which is of interest to the design of digital system such as servers. In particular, signal mode conversion as the result of undesired imbalances in the board interconnects plays a significant role in the generation of noise emission. In this paper, we investigate methods for modeling common/differential mode conversion from relatively complex interconnection structures in a multi-Gbps system using a systematic approach. The strong correlation of good signal integrity practices to electromagnetic emission is discussed with emphasis on key structure contributors. The electrical modeling of key contributors (such as vias, connectors, traces, manufacturing techniques, etc.) to undesired mode conversion effects is also presented in a telecommunication blade environment.
Keywords :
electromagnetic waves; telecommunication; board interconnects; common mode conversion modeling; differential mode conversion modeling; digital system design; electrical modeling; electromagnetic emission; mode conversion effects; multiGbps system; multiGbps telecommunications blade system; multilayer circuit boards; noise emission; radiation prediction; relatively complex interconnection structures; signal mode conversion; Blades; Circuit noise; Connectors; Digital systems; Integrated circuit interconnections; Noise generators; Nonhomogeneous media; Printed circuits; Signal generators; Virtual manufacturing;
Conference_Titel :
Electromagnetic Compatibility, 2009. EMC 2009. IEEE International Symposium on
Conference_Location :
Austin, TX
Print_ISBN :
978-1-4244-4266-9
Electronic_ISBN :
978-1-4244-4058-0
DOI :
10.1109/ISEMC.2009.5284560