Shield Routing with Differential Pairs - Quick Tip

Shield Routing in Allegro X PCB Editor lets you add copper shields and keepouts that follow your signal routes and stay linked for future updates. It’s especially useful for noise sensitive and highspeed designs.

Best Way to Use It with Differential Pairs:

1. Route the differential pair first
2. Go to Route > Shield Router.
3. Set Mode = Select clines.
4. Set your shield parameters (side/tandem, width, gap) in the Parameters section.

In the canvas:

1. RMB > Temp Group

2. Select both diff‑pair nets

3. RMB > Done

4. One consistent shield is created for both nets.

Why Use Shield Routing?

• No manual copper shapes
• Shields update automatically when routes change
• Supports side shields, tandem shields, and via fences
• Ideal for DDR, SERDES, USB, PCIe, and RF signals

Have you tried shield routing on high‑speed or RF designs?

Share your use case!