It is designed for passive antenna at the moment (I think they just took the default diagram for SIM5360). I have asked them to make a change in production version to switch to use active antenna circuit. Much easier to find active antennas, and they are half the price of the passive ones.
The existing boards are fairly easy to ‘mod’, if required. Seems to be just a 47nH + 10R in series between antenna and VDD (3.xV).
Or just use a passive antenna. Something like this?
-- Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal Fon 02333 / 833 5735 * Handy 0176 / 206 989 26