the PiCan GPS uses this chip:

https://cdn-shop.adafruit.com/datasheets/GlobalTop-FGPMMOPA6H-Datasheet-V0A.pdf

it has a

  • Built-in 15X15X2.5mm ceramic patch antenna on the top of module

and

  • Automatic antenna switching function

An external antenna can be attached to the PiCan 2 GPS. Page 17 of the Datasheet has recommended specs for this external antenna. The antenna should be switched to automatically, if I understand it correctly – no need to remove the built in antenna.

The connector marked X1 on the board (look at our shop pictures) is for attaching the antenna.

This is an UFL connector.

Contact us in case you need bigger quantities, for support with sourcing the right antenna & connector cables.

Here’s the link to the PiCan 2 GPS on our shop for your convenience

https://buyzero.de/products/pican-2-mit-gps?variant=2470313951259#