Differential Connector Layout With Low-Dielectric Coupling for Noise Control

The patent applies local quality by introducing a low-dielectric constant portion only at the coupling portion between terminals, while other portions maintain the original dielectric constant. This localized modification increases common mode impedance at the coupling region to suppress common mode noise, without significantly affecting the differential impedance along the entire transmission path, thus resolving the contradiction between noise suppression and impedance matching.

The patent changes the dielectric constant parameter locally at the coupling portion by introducing a low-dielectric constant portion. This parameter change increases the common mode impedance at the coupling region, effectively suppressing common mode noise propagation, while the overall differential impedance remains within acceptable ranges due to the localized nature of the change.

The patent applies local quality by placing a low-dielectric constant portion specifically at the coupling portion where terminals are closest together. This localized intervention increases common mode impedance precisely where common mode noise is most likely to couple between differential pairs, without requiring uniform spacing reduction across the entire terminal length, thus suppressing noise while minimizing signal skew.

The low-dielectric constant portion acts as an intermediary element at the coupling region. It mediates the electromagnetic field interaction between adjacent differential pairs, increasing common mode impedance and suppressing noise coupling, while its localized presence minimizes the impact on differential signal timing and skew.