Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
The radiator is in the plane of the PC card. This is the method used on commercial 802.11b cards with the further reduction in board space by bending the far end of the radiator at a right angle at the far end.
The bend on the end also puts some radiation in the direction of what would have been the end on to the radiator. I would suspect that the efficiency is under 100% and with radiation in all directions the gain would be slightly less than isotropic.