Describes an interconnected mesh plane system that includes at least a pair of adjacent metal layers separated by dielectric, each layer having a plurality of spaced power, ground, and signal conductors extending in the same direction, with the conductors of one layer of the pair transverse to the conductors of the other layer, and with conductors of one layer connected to corresponding conductors of the other layer. The width of at least one signal conductor is increased to reduce signal loss, and the width of spaces between such a signal conductor and adjacent power and/or ground conductors is increased to provide a predetermined desired characteristic impedance of a transmission line that includes such a signal conductor
