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I'm designing a reverse F antenna. It is connected to ground and the antenna line.

It is built of several place fill with small overlaps. To do this, I declared the component as a net tie. The package exposes 2 ground pads and one antenna pad (called 0 on the pictures).

enter image description here

Now I'm facing an issue while placing it on the pcb :

I designed a ground plane around the antenna line and set the clearance rule for this net in order to get the correct impedance.

Problems :

  • The ground plane is poured against the ground plane of the antenna.

enter image description here

  • I tried to connect the ground plane and the ground pins of the antenna but I'm not allowed to do this. I suspect that altium assumes that there the whole antenna is connected to antenna line and therefore does not allow to reach the ground pad.

enter image description here

Do you have any idea on how to solve this issue ?

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  • \$\begingroup\$ I don't have enough reputation to post 3 pictures, so here is the third which illustrates the connection issue : i.stack.imgur.com/zusop.png \$\endgroup\$
    – Julien
    Dec 17, 2015 at 10:50
  • \$\begingroup\$ Can you make the pads bigger (and possiblly rectangular rather than round) so that they reach to the edge of the component? if so does that help you hook them up? \$\endgroup\$ Dec 17, 2015 at 10:56
  • \$\begingroup\$ Make an exception in the clearance rule saying "where the first object matches 'InPolygon('myGroundPolygon')' and where the second object matches 'InComponent('myAntenna')'", or something like that. Without seeing it, it's difficult to say for sure how it needs to be set up \$\endgroup\$
    – DerStrom8
    Dec 17, 2015 at 13:55
  • \$\begingroup\$ Glad to hear it! \$\endgroup\$
    – DerStrom8
    Dec 18, 2015 at 13:11

1 Answer 1

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Make an exception for the antenna, so the ground plane will connect to it.

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