Wirelessly posted (BlackBerry8530/5.0.0.973 Profile/MIDP-2.1 Configuration/CLDC-1.1 VendorID/105)
A simple antenna would be 102 inches of stiff wire soldered onto a panel mount UHF connector, with four more wires, arranged properly, as the ground plane. (The length of wire is from memory. Check sources on building a 1/4 wave ground plane, to verify the length.)
What are you trying to accomplish, with the antenna? "Work" is very subjective, as a dummy loads works, if all you want is a matched load, and a SWR of zero.