Circuit board

A circuit board, comprising:

• a substrate board having a plurality of board sides;
• a reference ground plane having a plurality of ground trace tiles connected in an array, each of the plurality of ground trace tiles defined by a plurality of ground traces, any one ground trace of each tile consistent with an extension direction of one determined board side;
• a ground plane below the substrate board;
• a signal plane on the substrate board having a plurality of signal traces that comprises of a plurality of straight line segments arranged on the substrate board, the plurality of straight line segments mapped on the ground plane crossing one of the plurality of ground traces within a first angle range determined by one of the plurality of ground traces of one tile and an adjacent diagonal line of the one tile, so as to minimize interaction between the ground traces and the signal traces and reduce impedance differences of the signal traces;
• wherein a second angle range defined between the reference ground plane and the one determined board side is from 12.5° to 32.5°;
• and an angle defined between the reference ground plane and the one determined board side is 22.5°.

A circuit board, comprising:

• a substrate board having a plurality of board sides;
• a reference ground plane having a plurality of tiles connected in an array, each ground trace tile defined by a plurality of ground traces, each ground trace being wavy;
• a ground plane below the substrate board;
• a signal plane on the substrate board having a plurality of signal traces that comprises of a plurality of straight line segments arranged on the substrate board, the plurality of straight line segments mapped on the ground plane crossing one of the plurality of ground traces within a first angle range determined by one the plurality of ground traces of one tile and an adjacent diagonal line of the one tile, so as to minimize interaction between the ground traces and the signal traces and reduce impedance differences of the signal traces.