Applied Parameters: Mode=AddShielding
This command is used to place shielding vias around a nominated net (or selected objects associated with that net) in the active design. A Via Shield is used to create a vertical copper barrier through the PCB to help reduce crosstalk and electromagnetic interference in a route that is carrying an RF signal. A via shield, also known as a via fence or a picket fence, is created by placing one or more rows of vias alongside a signal route.
This command is accessed from the PCB Editor by choosing the Tools » Via Stitching/Shielding » Add Shielding to Net command from the main menus.
After launching the command, the Add Shielding to Net dialog will open. Use this dialog to configure shielding settings for the design including shielding parameters and via style.
As well as adding shielding vias along each side of the routing, you can also include shielding copper. To do this, enable the Add shielding copper option in the dialog. This copper is created as a polygon, and therefore, it obeys the applicable Clearance and Polygon Connect Style design rules. To give better control of keeping this shielding copper away from the shielded net, the dialog also includes an Add clearance cutout option. When this option is enabled, a polygon cutout is placed around the shielded net with its edge set back from the routing at the same Distance as the shielding vias.
- Each set of shielding vias are added to a union. A set can be removed by running the Tools » Via Stitching/Shielding » Remove Via Shielding Group command then clicking on any shielding via in the group.