How to Add RF Shielding on PCB: Simple Steps and Tips

To add RF shielding on a PCB, place a grounded metal shield enclosure around sensitive components or traces to block electromagnetic interference. Use copper pour connected to ground and design the shield with minimal gaps for effective protection.

Syntax

Adding RF shielding on a PCB involves these key parts:

• Shield enclosure: A metal cover or copper area that surrounds sensitive parts.
• Ground connection: The shield must connect to the PCB ground to drain interference.
• Via stitching: Multiple vias connect the shield to ground layers for better effectiveness.
• Minimal gaps: Avoid large openings in the shield to prevent leakage.

pseudo

CopperPour = CreateCopperPour(area, net='GND')
ShieldEnclosure = PlaceMetalShield(over=SensitiveComponents)
ViaStitching = AddVias(around=ShieldEnclosure, connectTo='GND')

Example

This example shows how to add a copper shield around a sensitive RF amplifier on a PCB using a copper pour connected to ground and via stitching.

steps

1. Define copper pour area around RF amplifier component.
2. Assign copper pour to the ground net (GND).
3. Place multiple vias along the copper pour edges connecting to inner ground layers.
4. Ensure the copper pour fully encloses the component with minimal gaps.
5. Optionally, add a metal shield can soldered on top for extra protection.

Output

Copper pour surrounds RF amplifier and is connected to ground via multiple vias, reducing RF interference effectively.

Common Pitfalls

Common mistakes when adding RF shielding on PCBs include:

• Not connecting the shield to ground properly, which makes it ineffective.
• Leaving large gaps or openings in the shield, allowing interference to leak through.
• Using too few vias, reducing the shield's grounding quality.
• Placing the shield too far from sensitive components, weakening protection.

Always verify the shield is continuous and well grounded.

pseudo

Wrong:
CopperPour = CreateCopperPour(area, net='Signal')  # Not grounded

Right:
CopperPour = CreateCopperPour(area, net='GND')  # Proper grounding

Quick Reference

Step	Description
1	Create a copper pour around sensitive components.
2	Connect the copper pour to the PCB ground net.
3	Add multiple vias along the copper pour edges to ground layers.
4	Minimize gaps in the shield area to prevent leakage.
5	Optionally, add a metal shield can for extra RF protection.

Key Takeaways

Always connect the RF shield to the PCB ground for effective interference blocking.

Use copper pours and via stitching to create continuous, grounded shields.

Minimize gaps in the shield to prevent RF leakage.

Place the shield close to sensitive components for best protection.

Consider metal shield cans for additional RF shielding when needed.