RF Enclosure High Speed Data Routing white paper DVTEST
30 Aug

RF Enclosure High Speed Data Routing

Differential transmission lines play an important role in high speed digital circuits due to their immunity to noise and Electromagnetic Interference (EMI). Differential pairs are composed of symmetrical signal traces where signals propagate. The traces are aimed to be designed with minimum fabrication discontinuity ensuring a balanced propagation. Any imbalance will generate noise – which is an unwanted common-mode signal that couples to the shield, ground or I/O cables and causes EMI problems. In recent years, the number of differential pairs for high speed data communication has increased to accommodate higher quality and data rate. As in USB 3.0, PCI-Express II, the increasing number of differential pairs become a challenge in routing the signal traces symmetrically, and that can cause common-mode noise issues. Also, crosstalk between differential pairs can reduce signal quality