Effects of Mechanical Tolerances of USB 2.0 Cables on Skew and Radiated Emission

Abstract

This paper analyzes skew due to unavoidable mechanical tolerances of a universal serial bus (USB) 2.0 cable. The contribution of the tolerances to the skew is determined via full-wave simulation of the cable cross section. The contributing factors and interaction terms are found using fractional factorial experimental design. Each factor's sensitivity to skew is investigated using Monte Carlo simulations. The design of experiments approach allows recognition of the relationship between the mechanical tolerances and skew. The skew-emission relationship, however, is found through a systematic approach. It was observed that adding about 20-30 ps net skew leads to about 4-5 dB increase in the emission above 350 MHz.

Department(s)

Electrical and Computer Engineering

Comments

This material is based upon work supported by the National Science Foundation (NSF) under Grants IIP-1440110.

Keywords and Phrases

Cables; Design of experiments (DoE); Intelligent systems; Monte Carlo methods; Statistics; System buses; Fractional factorial experimental design; Mechanical tolerances; Radiated emissions; Skew; Universal serial bus; Fits and tolerances; High speed universal serial bus (USB) cables

International Standard Serial Number (ISSN)

0018-9375; 1558-187X

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2018 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Dec 2018

Link to Full Text

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