The EMI characteristics of High Speed backplane connector

High Speed connector has played a critical role in data transfer from IC, through a channel to the receiving end. As industry constantly has an insatiable desire for high data rate, this pushed signal rise time and clock speed to be faster and faster. European CE conformity requirements have required wider measurement bandwidth, from 30MHz-1GHz to 30MHz-6GHz. Radiated emission characteristics of a high speed connector in a channel are of interest, because its component size now approaches the effective radiating length of λ/4. This paper focuses on high frequency radiation mechanism and radiation affecting factors for a generic backplane connector. Techniques to suppress connector radiated emissions are also suggested in this paper.