Effects of Mechanical Tolerances of USB 2.0 Cables on Skew and Radiated Emission
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.
O. H. Izadi et al., "Effects of Mechanical Tolerances of USB 2.0 Cables on Skew and Radiated Emission," IEEE Transactions on Electromagnetic Compatibility, vol. 62, no. 1, pp. 249-257, Institute of Electrical and Electronics Engineers (IEEE), Dec 2018.
The definitive version is available at https://doi.org/10.1109/TEMC.2018.2881970
Electrical and Computer Engineering
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)
Article - Journal
© 2018 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.
01 Dec 2018