Paddle card for crosstalk cancellation in high-speed signaling

A paddle card, comprising:

• a printed circuit board (PCB) including a first signal pad on a top surface of the PCB, a second signal pad on a bottom surface of the PCB, a third signal pad on the top surface, a fourth signal pad on the bottom surface, a first signal trace on the top surface coupled to the first signal pad, a second signal trace on the top surface coupled to the second signal pad by a first through-hole via, a third signal trace on the top surface coupled to the third signal pad, and a fourth signal trace on the top surface coupled to the fourth signal pad by a second through-hole via, wherein the second signal pad is directly below the first signal pad and the fourth signal pad is directly below the third signal pad;
• a first twin-axial cable including a first signal conductor coupled to the first signal pad and a second signal conductor coupled to the second signal pad;
• and
• a second twin-axial cable including a third signal conductor coupled to the third signal pad and a fourth signal conductor coupled to the fourth signal pad;
• wherein the second signal trace is adjacent to the fourth signal trace.

A method of forming a paddle card, the method comprising:

• forming, on a top surface of a printed circuit board (PCB), a first signal pad;
• forming, on a bottom surface of the PCB, a second signal pad, the second signal pad being directly below the first signal pad;
• coupling a first signal conductor of a first twin-axial cable to the first signal pad;
• and
• coupling a second signal conductor of the first twin-axial cable to the second signal pad.