A midplane has a first side to which contact ends of a first differential connector are connected and a second side opposite the first side to which contact ends of a second differential connector are connected. The midplane includes a plurality of vias extending from the first side to the second side,...http://www.google.de/patents/US7422484?utm_source=gb-gplus-sharePatent US7422484 - Midplane especially applicable to an orthogonal architecture electronic system
