iPhone 4 logic board snapped

While repairing my daughters iphone 4 I found that a small part of the
logic / motherboard had snapped off.
This is the part at the top, of the board probably about 1mm square, that
connects the wifi antenna to the board,
My question is, is there any suitable glue (obviously not super glue, to brittle when hot and doesn't conduct if needed) that could be used, as this has now caused the phone to only pick up wifi if stood within about 1 - 2 feet from the router.

Apart from this, the phone is perfect so would be a shame to lose it over what is
really a small issue

I have attatched a pic, the snapped piece is the one that has been circled in red.

MAny thanks.

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