A connector assembly for connecting to differential signal circuits on at least one circuit board may be of the docking type or the interposer type. A housing of the connector has transversely and longitudinally extending walls that define a plurality of cavities that extend completely through the housing....http://www.google.com.hk/patents/US6848917?utm_source=gb-gplus-share專利 US6848917 - High-speed differential signal connector with interstitial ground aspect
